155891982 has 16 divisors (see below), whose sum is σ = 316438272. Its totient is φ = 51188280.

The previous prime is 155891971. The next prime is 155892001. The reversal of 155891982 is 289198551.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193494 + ... + 194297.

It is an arithmetic number, because the mean of its divisors is an integer number (19777392).

Almost surely, 2^155891982 is an apocalyptic number.

155891982 is an abundant number, since it is smaller than the sum of its proper divisors (160546290).

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

155891982 is a wasteful number, since it uses less digits than its factorization.

155891982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387863.

The product of its digits is 259200, while the sum is 48.

The square root of 155891982 is about 12485.6710672675. The cubic root of 155891982 is about 538.1969838321.

It can be divided in two parts, 15589 and 1982, that added together give a palindrome (17571).

The spelling of 155891982 in words is "one hundred fifty-five million, eight hundred ninety-one thousand, nine hundred eighty-two".