256350731 has 16 divisors (see below), whose sum is σ = 320687808. Its totient is φ = 199497600.

The previous prime is 256350719. The next prime is 256350751. The reversal of 256350731 is 137053652.

It is a cyclic number.

It is not a de Polignac number, because 256350731 - 2¹⁸ = 256088587 is a prime.

It is a super-2 number, since 2×256350731² = 131431394568468722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256350751) 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, 17540 + ... + 28641.

It is an arithmetic number, because the mean of its divisors is an integer number (20042988).

Almost surely, 2^256350731 is an apocalyptic number.

256350731 is a deficient number, since it is larger than the sum of its proper divisors (64337077).

256350731 is a wasteful number, since it uses less digits than its factorization.

256350731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46262.

The product of its (nonzero) digits is 18900, while the sum is 32.

The square root of 256350731 is about 16010.9565922839. The cubic root of 256350731 is about 635.2502628155.

The spelling of 256350731 in words is "two hundred fifty-six million, three hundred fifty thousand, seven hundred thirty-one".