256361272 has 8 divisors (see below), whose sum is σ = 480677400. Its totient is φ = 128180632.

The previous prime is 256361269. The next prime is 256361291. The reversal of 256361272 is 272163652.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×256361272² = 131442203562915968, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16022572 + ... + 16022587.

It is an arithmetic number, because the mean of its divisors is an integer number (60084675).

Almost surely, 2^256361272 is an apocalyptic number.

It is an amenable number.

256361272 is a deficient number, since it is larger than the sum of its proper divisors (224316128).

256361272 is a wasteful number, since it uses less digits than its factorization.

256361272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32045165 (or 32045161 counting only the distinct ones).

The product of its digits is 30240, while the sum is 34.

The square root of 256361272 is about 16011.2857697313. The cubic root of 256361272 is about 635.2589697424.

The spelling of 256361272 in words is "two hundred fifty-six million, three hundred sixty-one thousand, two hundred seventy-two".