256017453 has 8 divisors (see below), whose sum is σ = 341471616. Its totient is φ = 170620800.

The previous prime is 256017449. The next prime is 256017469. The reversal of 256017453 is 354710652.

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

It is not a de Polignac number, because 256017453 - 2² = 256017449 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256017473) 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, 2613 + ... + 22778.

It is an arithmetic number, because the mean of its divisors is an integer number (42683952).

Almost surely, 2^256017453 is an apocalyptic number.

It is an amenable number.

256017453 is a deficient number, since it is larger than the sum of its proper divisors (85454163).

256017453 is a wasteful number, since it uses less digits than its factorization.

256017453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28755.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 256017453 is about 16000.5453969544. The cubic root of 256017453 is about 634.9748501003.

The spelling of 256017453 in words is "two hundred fifty-six million, seventeen thousand, four hundred fifty-three".