256552500 has 120 divisors (see below), whose sum is σ = 759256960. Its totient is φ = 67392000.

The previous prime is 256552481. The next prime is 256552501. The reversal of 256552500 is 5255652.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256552501) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 592284 + ... + 592716.

Almost surely, 2^256552500 is an apocalyptic number.

256552500 is a gapful number since it is divisible by the number (20) 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 256552500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (379628480).

256552500 is an abundant number, since it is smaller than the sum of its proper divisors (502704460).

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

256552500 is a wasteful number, since it uses less digits than its factorization.

256552500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 522 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 256552500 is about 16017.2563193576. The cubic root of 256552500 is about 635.4168837528.

The spelling of 256552500 in words is "two hundred fifty-six million, five hundred fifty-two thousand, five hundred".