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2152423 = 721331109
BaseRepresentation
bin1000001101011111100111
311001100120101
420031133213
51022334143
6114044531
724203200
oct10153747
94040511
102152423
111240169
12879747
135a4930
144005a7
152c7b4d
hex20d7e7

2152423 has 24 divisors (see below), whose sum is σ = 2808960. Its totient is φ = 1632960.

The previous prime is 2152399. The next prime is 2152427. The reversal of 2152423 is 3242512.

It is a de Polignac number, because none of the positive numbers 2k-2152423 is a prime.

It is an Ulam number.

Its product of digits (480) is a multiple of the sum of its prime divisors (160).

It is a self number, because there is not a number n which added to its sum of digits gives 2152423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19693 + ... + 19801.

It is an arithmetic number, because the mean of its divisors is an integer number (117040).

22152423 is an apocalyptic number.

2152423 is a deficient number, since it is larger than the sum of its proper divisors (656537).

2152423 is a wasteful number, since it uses less digits than its factorization.

2152423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 160 counting only the distinct ones).

The product of its digits is 480, while the sum is 19.

The square root of 2152423 is about 1467.1138333476. The cubic root of 2152423 is about 129.1147547667.

Adding to 2152423 its reverse (3242512), we get a palindrome (5394935).

The spelling of 2152423 in words is "two million, one hundred fifty-two thousand, four hundred twenty-three".

Divisors: 1 7 13 31 49 91 109 217 403 637 763 1417 1519 2821 3379 5341 9919 19747 23653 43927 69433 165571 307489 2152423