155881228 has 12 divisors (see below), whose sum is σ = 288838872. Its totient is φ = 73355840.

The previous prime is 155881217. The next prime is 155881249. The reversal of 155881228 is 822188551.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1146118 + ... + 1146253.

It is an arithmetic number, because the mean of its divisors is an integer number (24069906).

Almost surely, 2^155881228 is an apocalyptic number.

It is an amenable number.

155881228 is a deficient number, since it is larger than the sum of its proper divisors (132957644).

155881228 is a wasteful number, since it uses less digits than its factorization.

155881228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292392 (or 2292390 counting only the distinct ones).

The product of its digits is 51200, while the sum is 40.

The square root of 155881228 is about 12485.2404061756. The cubic root of 155881228 is about 538.1846079477.

The spelling of 155881228 in words is "one hundred fifty-five million, eight hundred eighty-one thousand, two hundred twenty-eight".