257531732 has 12 divisors (see below), whose sum is σ = 450793140. Its totient is φ = 128733696.

The previous prime is 257531731. The next prime is 257531737. The reversal of 257531732 is 237135752.

It can be written as a sum of positive squares in 2 ways, for example, as 156850576 + 100681156 = 12524^2 + 10034^2 .

It is a junction number, because it is equal to n+sod(n) for n = 257531692 and 257531701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257531731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25658 + ... + 34254.

It is an arithmetic number, because the mean of its divisors is an integer number (37566095).

Almost surely, 2^257531732 is an apocalyptic number.

It is an amenable number.

257531732 is a deficient number, since it is larger than the sum of its proper divisors (193261408).

257531732 is a wasteful number, since it uses less digits than its factorization.

257531732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16090 (or 16088 counting only the distinct ones).

The product of its digits is 44100, while the sum is 35.

The square root of 257531732 is about 16047.7952379758. The cubic root of 257531732 is about 636.2242955844.

The spelling of 257531732 in words is "two hundred fifty-seven million, five hundred thirty-one thousand, seven hundred thirty-two".