256410216306031 has 16 divisors (see below), whose sum is σ = 259524597648960. Its totient is φ = 253307161324800.

The previous prime is 256410216305977. The next prime is 256410216306047. The reversal of 256410216306031 is 130603612014652.

It is a cyclic number.

It is not a de Polignac number, because 256410216306031 - 2²¹ = 256410214208879 is a prime.

It is a super-2 number, since 2×256410216306031² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256410216307031) 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, 1618600630 + ... + 1618759036.

It is an arithmetic number, because the mean of its divisors is an integer number (16220287353060).

Almost surely, 2^{256410216306031} is an apocalyptic number.

256410216306031 is a deficient number, since it is larger than the sum of its proper divisors (3114381342929).

256410216306031 is a wasteful number, since it uses less digits than its factorization.

256410216306031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194034.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 256410216306031 in words is "two hundred fifty-six trillion, four hundred ten billion, two hundred sixteen million, three hundred six thousand, thirty-one".