82957021 has 32 divisors (see below), whose sum is σ = 106536960. Its totient is φ = 62954496.

The previous prime is 82957003. The next prime is 82957027. The reversal of 82957021 is 12075928.

It is not a de Polignac number, because 82957021 - 2¹¹ = 82954973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82957027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143485 + ... + 144061.

It is an arithmetic number, because the mean of its divisors is an integer number (3329280).

Almost surely, 2^82957021 is an apocalyptic number.

It is an amenable number.

82957021 is a deficient number, since it is larger than the sum of its proper divisors (23579939).

82957021 is a wasteful number, since it uses less digits than its factorization.

82957021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 82957021 is about 9108.0744946448. The cubic root of 82957021 is about 436.1317620031.

The spelling of 82957021 in words is "eighty-two million, nine hundred fifty-seven thousand, twenty-one".