82239525 has 18 divisors (see below), whose sum is σ = 147300530. Its totient is φ = 43860960.

The previous prime is 82239511. The next prime is 82239551. The reversal of 82239525 is 52593228.

It can be written as a sum of positive squares in 3 ways, for example, as 1077444 + 81162081 = 1038^2 + 9009^2 .

It is a de Polignac number, because none of the positive numbers 2^k-82239525 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 82239525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 182530 + ... + 182979.

Almost surely, 2^82239525 is an apocalyptic number.

It is an amenable number.

82239525 is a deficient number, since it is larger than the sum of its proper divisors (65061005).

82239525 is a wasteful number, since it uses less digits than its factorization.

82239525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365525 (or 365517 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 82239525 is about 9068.6010497761. The cubic root of 82239525 is about 434.8707503440.

The spelling of 82239525 in words is "eighty-two million, two hundred thirty-nine thousand, five hundred twenty-five".