155624256 has 168 divisors, whose sum is σ = 493556544. Its totient is φ = 46632960.

The previous prime is 155624221. The next prime is 155624281. The reversal of 155624256 is 652426551.

155624256 is a `hidden beast` number, since 1 + 5 + 5 + 624 + 25 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 155624256.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224871 + ... + 225561.

Almost surely, 2^155624256 is an apocalyptic number.

155624256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155624256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246778272).

155624256 is an abundant number, since it is smaller than the sum of its proper divisors (337932288).

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

155624256 is a wasteful number, since it uses less digits than its factorization.

155624256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749 (or 736 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 155624256 is about 12474.9451301399. The cubic root of 155624256 is about 537.8887107829. Note that the first 3 decimals are identical.

The spelling of 155624256 in words is "one hundred fifty-five million, six hundred twenty-four thousand, two hundred fifty-six".