256153500 has 72 divisors (see below), whose sum is σ = 808093104. Its totient is φ = 68306400.

The previous prime is 256153489. The next prime is 256153511. The reversal of 256153500 is 5351652.

256153500 is a `hidden beast` number, since 2 + 5 + 6 + 153 + 500 = 666.

It is an interprime number because it is at equal distance from previous prime (256153489) and next prime (256153511).

It is a super-2 number, since 2×256153500² = 131229231124500000, 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 23 ways as a sum of consecutive naturals, for example, 23962 + ... + 32961.

Almost surely, 2^256153500 is an apocalyptic number.

256153500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256153500 is an abundant number, since it is smaller than the sum of its proper divisors (551939604).

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

256153500 is a wasteful number, since it uses less digits than its factorization.

256153500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56948 (or 56933 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 256153500 is about 16004.7961561527. The cubic root of 256153500 is about 635.0873048374.

The spelling of 256153500 in words is "two hundred fifty-six million, one hundred fifty-three thousand, five hundred".