1551015256 has 32 divisors (see below), whose sum is σ = 3357879840. Its totient is φ = 657865728.

The previous prime is 1551015251. The next prime is 1551015329. The reversal of 1551015256 is 6525101551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551015251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137335 + ... + 148198.

It is an arithmetic number, because the mean of its divisors is an integer number (104933745).

Almost surely, 2^1551015256 is an apocalyptic number.

It is an amenable number.

1551015256 is an abundant number, since it is smaller than the sum of its proper divisors (1806864584).

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

1551015256 is a wasteful number, since it uses less digits than its factorization.

1551015256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285643 (or 285639 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 31.

The square root of 1551015256 is about 39382.9310234777. The cubic root of 1551015256 is about 1157.5471495798.

The spelling of 1551015256 in words is "one billion, five hundred fifty-one million, fifteen thousand, two hundred fifty-six".