255533731 has 2 divisors, whose sum is σ = 255533732. Its totient is φ = 255533730.

The previous prime is 255533699. The next prime is 255533801. The reversal of 255533731 is 137335552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255533731 - 2⁵ = 255533699 is a prime.

It is a super-2 number, since 2×255533731² = 130594975357560722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (255533431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127766865 + 127766866.

It is an arithmetic number, because the mean of its divisors is an integer number (127766866).

Almost surely, 2^255533731 is an apocalyptic number.

255533731 is a deficient number, since it is larger than the sum of its proper divisors (1).

255533731 is an equidigital number, since it uses as much as digits as its factorization.

255533731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47250, while the sum is 34.

The square root of 255533731 is about 15985.4224529726. The cubic root of 255533731 is about 634.5746886411.

The spelling of 255533731 in words is "two hundred fifty-five million, five hundred thirty-three thousand, seven hundred thirty-one".