257251133 has 4 divisors (see below), whose sum is σ = 257407488. Its totient is φ = 257094780.

The previous prime is 257251117. The next prime is 257251171. The reversal of 257251133 is 331152752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 257251133 - 2⁴ = 257251117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257251096 and 257251105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257251193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75683 + ... + 79008.

It is an arithmetic number, because the mean of its divisors is an integer number (64351872).

Almost surely, 2^257251133 is an apocalyptic number.

It is an amenable number.

257251133 is a deficient number, since it is larger than the sum of its proper divisors (156355).

257251133 is a wasteful number, since it uses less digits than its factorization.

257251133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156354.

The product of its digits is 6300, while the sum is 29.

The square root of 257251133 is about 16039.0502524308. The cubic root of 257251133 is about 635.9931411849.

The spelling of 257251133 in words is "two hundred fifty-seven million, two hundred fifty-one thousand, one hundred thirty-three".