257484551 has 12 divisors (see below), whose sum is σ = 267951600. Its totient is φ = 247278240.

The previous prime is 257484433. The next prime is 257484583. The reversal of 257484551 is 155484752.

It is a de Polignac number, because none of the positive numbers 2^k-257484551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257484499 and 257484508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257484151) 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, 183350 + ... + 184748.

It is an arithmetic number, because the mean of its divisors is an integer number (22329300).

Almost surely, 2^257484551 is an apocalyptic number.

257484551 is a deficient number, since it is larger than the sum of its proper divisors (10467049).

257484551 is an equidigital number, since it uses as much as digits as its factorization.

257484551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574 (or 1507 counting only the distinct ones).

The product of its digits is 224000, while the sum is 41.

The square root of 257484551 is about 16046.3251556236. The cubic root of 257484551 is about 636.1854401372.

The spelling of 257484551 in words is "two hundred fifty-seven million, four hundred eighty-four thousand, five hundred fifty-one".