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2300032021 = 72291618601
BaseRepresentation
bin1000100100010111…
…1011010000010101
312221021220201210011
42021011323100111
514202302011041
61020121400221
7110665643500
oct21105732025
95837821704
102300032021
11a80343111
12542339071
132a86868c1
1417b67a137
15d6dcae81
hex8917b415

2300032021 has 12 divisors (see below), whose sum is σ = 2767809420. Its totient is φ = 1903473600.

The previous prime is 2300032019. The next prime is 2300032057. The reversal of 2300032021 is 1202300032.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 638572900 + 1661459121 = 25270^2 + 40761^2 .

It is not a de Polignac number, because 2300032021 - 21 = 2300032019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2300031992 and 2300032010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2300032001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 807880 + ... + 810721.

It is an arithmetic number, because the mean of its divisors is an integer number (230650785).

Almost surely, 22300032021 is an apocalyptic number.

It is an amenable number.

2300032021 is a deficient number, since it is larger than the sum of its proper divisors (467777399).

2300032021 is a wasteful number, since it uses less digits than its factorization.

2300032021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618644 (or 1618637 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 2300032021 is about 47958.6490739679. The cubic root of 2300032021 is about 1320.0122475524.

Adding to 2300032021 its reverse (1202300032), we get a palindrome (3502332053).

The spelling of 2300032021 in words is "two billion, three hundred million, thirty-two thousand, twenty-one".

Divisors: 1 7 29 49 203 1421 1618601 11330207 46939429 79311449 328576003 2300032021