256747053 has 8 divisors (see below), whose sum is σ = 353372416. Its totient is φ = 165643200.

The previous prime is 256747037. The next prime is 256747061. The reversal of 256747053 is 350747652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256747053 - 2⁴ = 256747037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256747093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1380268 + ... + 1380453.

It is an arithmetic number, because the mean of its divisors is an integer number (44171552).

Almost surely, 2^256747053 is an apocalyptic number.

It is an amenable number.

256747053 is a deficient number, since it is larger than the sum of its proper divisors (96625363).

256747053 is a wasteful number, since it uses less digits than its factorization.

256747053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760755.

The product of its (nonzero) digits is 176400, while the sum is 39.

The square root of 256747053 is about 16023.3283995554. The cubic root of 256747053 is about 635.5774630041.

The spelling of 256747053 in words is "two hundred fifty-six million, seven hundred forty-seven thousand, fifty-three".