82521023 has 4 divisors (see below), whose sum is σ = 88868808. Its totient is φ = 76173240.

The previous prime is 82521013. The next prime is 82521029. The reversal of 82521023 is 32012528.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 82521023 - 2²² = 78326719 is a prime.

It is a super-3 number, since 3×82521023³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82521023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82521029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3173873 + ... + 3173898.

It is an arithmetic number, because the mean of its divisors is an integer number (22217202).

Almost surely, 2^82521023 is an apocalyptic number.

82521023 is a deficient number, since it is larger than the sum of its proper divisors (6347785).

82521023 is a wasteful number, since it uses less digits than its factorization.

82521023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6347784.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 82521023 is about 9084.1082666380. The cubic root of 82521023 is about 435.3663589117.

The spelling of 82521023 in words is "eighty-two million, five hundred twenty-one thousand, twenty-three".