257755533 has 12 divisors (see below), whose sum is σ = 399784320. Its totient is φ = 147288792.

The previous prime is 257755529. The next prime is 257755559. The reversal of 257755533 is 335557752.

It is not a de Polignac number, because 257755533 - 2² = 257755529 is a prime.

It is a super-2 number, since 2×257755533² = 132875829584228178, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257755523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 876573 + ... + 876866.

It is an arithmetic number, because the mean of its divisors is an integer number (33315360).

Almost surely, 2^257755533 is an apocalyptic number.

It is an amenable number.

257755533 is a deficient number, since it is larger than the sum of its proper divisors (142028787).

257755533 is a wasteful number, since it uses less digits than its factorization.

257755533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753456 (or 1753449 counting only the distinct ones).

The product of its digits is 551250, while the sum is 42.

The square root of 257755533 is about 16054.7666753522. The cubic root of 257755533 is about 636.4085400738.

The spelling of 257755533 in words is "two hundred fifty-seven million, seven hundred fifty-five thousand, five hundred thirty-three".