256153013 has 2 divisors, whose sum is σ = 256153014. Its totient is φ = 256153012.

The previous prime is 256152979. The next prime is 256153057. The reversal of 256153013 is 310351652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206267044 + 49885969 = 14362^2 + 7063^2 .

It is a cyclic number.

It is not a de Polignac number, because 256153013 - 2¹² = 256148917 is a prime.

It is a super-2 number, since 2×256153013² = 131228732137956338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256153063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128076506 + 128076507.

It is an arithmetic number, because the mean of its divisors is an integer number (128076507).

Almost surely, 2^256153013 is an apocalyptic number.

It is an amenable number.

256153013 is a deficient number, since it is larger than the sum of its proper divisors (1).

256153013 is an equidigital number, since it uses as much as digits as its factorization.

256153013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 256153013 is about 16004.7809419561. The cubic root of 256153013 is about 635.0869023603.

The spelling of 256153013 in words is "two hundred fifty-six million, one hundred fifty-three thousand, thirteen".