256354253 has 8 divisors (see below), whose sum is σ = 257862528. Its totient is φ = 254850544.

The previous prime is 256354223. The next prime is 256354291. The reversal of 256354253 is 352453652.

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

It is a cyclic number.

It is not a de Polignac number, because 256354253 - 2¹⁴ = 256337869 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 (256354223) 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, 209000 + ... + 210222.

It is an arithmetic number, because the mean of its divisors is an integer number (32232816).

Almost surely, 2^256354253 is an apocalyptic number.

It is an amenable number.

256354253 is a deficient number, since it is larger than the sum of its proper divisors (1508275).

256354253 is a wasteful number, since it uses less digits than its factorization.

256354253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2283.

The product of its digits is 108000, while the sum is 35.

The square root of 256354253 is about 16011.0665790884. The cubic root of 256354253 is about 635.2531720344.

The spelling of 256354253 in words is "two hundred fifty-six million, three hundred fifty-four thousand, two hundred fifty-three".