256461510 has 32 divisors (see below), whose sum is σ = 622429920. Its totient is φ = 67620608.

The previous prime is 256461493. The next prime is 256461511. The reversal of 256461510 is 15164652.

256461510 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×256461510² = 131545012222960200, which contains 22 as substring.

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 (256461511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45357 + ... + 50696.

It is an arithmetic number, because the mean of its divisors is an integer number (19450935).

Almost surely, 2^256461510 is an apocalyptic number.

256461510 is an abundant number, since it is smaller than the sum of its proper divisors (365968410).

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

256461510 is a wasteful number, since it uses less digits than its factorization.

256461510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96152.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 256461510 is about 16014.4156933683. The cubic root of 256461510 is about 635.3417549861.

The spelling of 256461510 in words is "two hundred fifty-six million, four hundred sixty-one thousand, five hundred ten".