156551982 has 24 divisors (see below), whose sum is σ = 330455016. Its totient is φ = 49436784.

The previous prime is 156551959. The next prime is 156551987. The reversal of 156551982 is 289155651.

It is a happy number.

156551982 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156551987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33973 + ... + 38304.

It is an arithmetic number, because the mean of its divisors is an integer number (13768959).

Almost surely, 2^156551982 is an apocalyptic number.

156551982 is an abundant number, since it is smaller than the sum of its proper divisors (173903034).

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

156551982 is a wasteful number, since it uses less digits than its factorization.

156551982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72320 (or 72301 counting only the distinct ones).

The product of its digits is 108000, while the sum is 42.

The square root of 156551982 is about 12512.0734492729. The cubic root of 156551982 is about 538.9554361404.

The spelling of 156551982 in words is "one hundred fifty-six million, five hundred fifty-one thousand, nine hundred eighty-two".