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2115213 = 31943863
BaseRepresentation
bin1000000100011010001101
310222110112020
420010122031
51020141323
6113200353
723656542
oct10043215
93873466
102115213
111215211
128600b9
13590a09
143d0bc9
152bbae3
hex20468d

2115213 has 16 divisors (see below), whose sum is σ = 3041280. Its totient is φ = 1303344.

The previous prime is 2115203. The next prime is 2115221. The reversal of 2115213 is 3125112.

It is not a de Polignac number, because 2115213 - 25 = 2115181 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2115192 and 2115201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2020 + ... + 2882.

It is an arithmetic number, because the mean of its divisors is an integer number (190080).

22115213 is an apocalyptic number.

It is an amenable number.

2115213 is a deficient number, since it is larger than the sum of its proper divisors (926067).

2115213 is a wasteful number, since it uses less digits than its factorization.

2115213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928.

The product of its digits is 60, while the sum is 15.

The square root of 2115213 is about 1454.3771862897. The cubic root of 2115213 is about 128.3664021526.

The spelling of 2115213 in words is "two million, one hundred fifteen thousand, two hundred thirteen".

Divisors: 1 3 19 43 57 129 817 863 2451 2589 16397 37109 49191 111327 705071 2115213