82155630 has 32 divisors (see below), whose sum is σ = 198288000. Its totient is φ = 21784352.

The previous prime is 82155617. The next prime is 82155631. The reversal of 82155630 is 3655128.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82155631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2280 + ... + 13019.

It is an arithmetic number, because the mean of its divisors is an integer number (6196500).

Almost surely, 2^82155630 is an apocalyptic number.

82155630 is an abundant number, since it is smaller than the sum of its proper divisors (116132370).

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

82155630 is a wasteful number, since it uses less digits than its factorization.

82155630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15488.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 82155630 is about 9063.9742938735. The cubic root of 82155630 is about 434.7228251438.

The spelling of 82155630 in words is "eighty-two million, one hundred fifty-five thousand, six hundred thirty".