257750533 has 2 divisors, whose sum is σ = 257750534. Its totient is φ = 257750532.

The previous prime is 257750503. The next prime is 257750543. The reversal of 257750533 is 335057752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245799684 + 11950849 = 15678^2 + 3457^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257750533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 257750492 and 257750501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257750503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128875266 + 128875267.

It is an arithmetic number, because the mean of its divisors is an integer number (128875267).

Almost surely, 2^257750533 is an apocalyptic number.

It is an amenable number.

257750533 is a deficient number, since it is larger than the sum of its proper divisors (1).

257750533 is an equidigital number, since it uses as much as digits as its factorization.

257750533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110250, while the sum is 37.

The square root of 257750533 is about 16054.6109576034. The cubic root of 257750533 is about 636.4044249817.

The spelling of 257750533 in words is "two hundred fifty-seven million, seven hundred fifty thousand, five hundred thirty-three".