257230755 has 32 divisors (see below), whose sum is σ = 464140800. Its totient is φ = 135137376.

The previous prime is 257230741. The next prime is 257230763. The reversal of 257230755 is 557032752.

It is a happy number.

257230755 is a `hidden beast` number, since 2 + 572 + 30 + 7 + 55 = 666.

It is not a de Polignac number, because 257230755 - 2⁶ = 257230691 is a prime.

It is a super-2 number, since 2×257230755² = 132335322635740050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5175 + ... + 23264.

It is an arithmetic number, because the mean of its divisors is an integer number (14504400).

Almost surely, 2^257230755 is an apocalyptic number.

257230755 is a deficient number, since it is larger than the sum of its proper divisors (206910045).

257230755 is a wasteful number, since it uses less digits than its factorization.

257230755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28520 (or 28514 counting only the distinct ones).

The product of its (nonzero) digits is 73500, while the sum is 36.

The square root of 257230755 is about 16038.4149777963. The cubic root of 257230755 is about 635.9763474650.

The spelling of 257230755 in words is "two hundred fifty-seven million, two hundred thirty thousand, seven hundred fifty-five".