155219056 has 20 divisors (see below), whose sum is σ = 316565800. Its totient is φ = 73524672.

The previous prime is 155219039. The next prime is 155219063. The reversal of 155219056 is 650912551.

It is a super-2 number, since 2×155219056² = 48185910691062272, which contains 22 as substring.

It is a congruent number.

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, 254991 + ... + 255598.

It is an arithmetic number, because the mean of its divisors is an integer number (15828290).

Almost surely, 2^155219056 is an apocalyptic number.

155219056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

155219056 is an abundant number, since it is smaller than the sum of its proper divisors (161346744).

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

155219056 is a wasteful number, since it uses less digits than its factorization.

155219056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510616 (or 510610 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 34.

The square root of 155219056 is about 12458.6939925499. The cubic root of 155219056 is about 537.4214701208.

The spelling of 155219056 in words is "one hundred fifty-five million, two hundred nineteen thousand, fifty-six".