256041615 has 16 divisors (see below), whose sum is σ = 413294688. Its totient is φ = 135346176.

The previous prime is 256041601. The next prime is 256041631. The reversal of 256041615 is 516140652.

It is not a de Polignac number, because 256041615 - 2²¹ = 253944463 is a prime.

It is a super-2 number, since 2×256041615² = 131114617223616450, 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 15 ways as a sum of consecutive naturals, for example, 73834 + ... + 77223.

It is an arithmetic number, because the mean of its divisors is an integer number (25830918).

Almost surely, 2^256041615 is an apocalyptic number.

256041615 is a deficient number, since it is larger than the sum of its proper divisors (157253073).

256041615 is a wasteful number, since it uses less digits than its factorization.

256041615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151178.

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

The square root of 256041615 is about 16001.3004159037. The cubic root of 256041615 is about 634.9948250141.

The spelling of 256041615 in words is "two hundred fifty-six million, forty-one thousand, six hundred fifteen".