82155402 has 48 divisors (see below), whose sum is σ = 212284800. Its totient is φ = 22451616.

The previous prime is 82155397. The next prime is 82155419. The reversal of 82155402 is 20455128.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11277 + ... + 17072.

It is an arithmetic number, because the mean of its divisors is an integer number (4422600).

Almost surely, 2^82155402 is an apocalyptic number.

82155402 is an abundant number, since it is smaller than the sum of its proper divisors (130129398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82155402 is a wasteful number, since it uses less digits than its factorization.

82155402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28387 (or 28384 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 82155402 is about 9063.9617166005. The cubic root of 82155402 is about 434.7224229928.

The spelling of 82155402 in words is "eighty-two million, one hundred fifty-five thousand, four hundred two".