155724122 has 16 divisors (see below), whose sum is σ = 244823040. Its totient is φ = 74146512.

The previous prime is 155724103. The next prime is 155724139. The reversal of 155724122 is 221427551.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3143 + ... + 17925.

It is an arithmetic number, because the mean of its divisors is an integer number (15301440).

Almost surely, 2^155724122 is an apocalyptic number.

155724122 is a deficient number, since it is larger than the sum of its proper divisors (89098918).

155724122 is a wasteful number, since it uses less digits than its factorization.

155724122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15037.

The product of its digits is 5600, while the sum is 29.

The square root of 155724122 is about 12478.9471511021. The cubic root of 155724122 is about 538.0037427820.

The spelling of 155724122 in words is "one hundred fifty-five million, seven hundred twenty-four thousand, one hundred twenty-two".