256037501 has 2 divisors, whose sum is σ = 256037502. Its totient is φ = 256037500.

The previous prime is 256037473. The next prime is 256037513. The reversal of 256037501 is 105730652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180364900 + 75672601 = 13430^2 + 8699^2 .

It is a cyclic number.

It is not a de Polignac number, because 256037501 - 2²⁶ = 188928637 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256037581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128018750 + 128018751.

It is an arithmetic number, because the mean of its divisors is an integer number (128018751).

Almost surely, 2^256037501 is an apocalyptic number.

It is an amenable number.

256037501 is a deficient number, since it is larger than the sum of its proper divisors (1).

256037501 is an equidigital number, since it uses as much as digits as its factorization.

256037501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 256037501 is about 16001.1718633355. The cubic root of 256037501 is about 634.9914240270.

The spelling of 256037501 in words is "two hundred fifty-six million, thirty-seven thousand, five hundred one".