256237453 has 2 divisors, whose sum is σ = 256237454. Its totient is φ = 256237452.

The previous prime is 256237451. The next prime is 256237463. The reversal of 256237453 is 354732652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215443684 + 40793769 = 14678^2 + 6387^2 .

It is a cyclic number.

It is not a de Polignac number, because 256237453 - 2¹ = 256237451 is a prime.

Together with 256237451, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256237451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128118726 + 128118727.

It is an arithmetic number, because the mean of its divisors is an integer number (128118727).

Almost surely, 2^256237453 is an apocalyptic number.

It is an amenable number.

256237453 is a deficient number, since it is larger than the sum of its proper divisors (1).

256237453 is an equidigital number, since it uses as much as digits as its factorization.

256237453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 37.

The square root of 256237453 is about 16007.4186863467. The cubic root of 256237453 is about 635.1566794646.

The spelling of 256237453 in words is "two hundred fifty-six million, two hundred thirty-seven thousand, four hundred fifty-three".