256505150 has 24 divisors (see below), whose sum is σ = 520473384. Its totient is φ = 93274400.

The previous prime is 256505101. The next prime is 256505159. The reversal of 256505150 is 51505652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256505159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 232637 + ... + 233736.

It is an arithmetic number, because the mean of its divisors is an integer number (21686391).

Almost surely, 2^256505150 is an apocalyptic number.

256505150 is an abundant number, since it is smaller than the sum of its proper divisors (263968234).

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

256505150 is a wasteful number, since it uses less digits than its factorization.

256505150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466396 (or 466391 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 256505150 is about 16015.7781578043. The cubic root of 256505150 is about 635.3777899473.

The spelling of 256505150 in words is "two hundred fifty-six million, five hundred five thousand, one hundred fifty".