255225731 has 2 divisors, whose sum is σ = 255225732. Its totient is φ = 255225730.

The previous prime is 255225679. The next prime is 255225749. The reversal of 255225731 is 137522552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255225731 - 2¹⁰ = 255224707 is a prime.

It is a super-2 number, since 2×255225731² = 130280347528968722, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (255225791) 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 as a sum of consecutive naturals, namely, 127612865 + 127612866.

It is an arithmetic number, because the mean of its divisors is an integer number (127612866).

Almost surely, 2^255225731 is an apocalyptic number.

255225731 is a deficient number, since it is larger than the sum of its proper divisors (1).

255225731 is an equidigital number, since it uses as much as digits as its factorization.

255225731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21000, while the sum is 32.

The square root of 255225731 is about 15975.7857709723. The cubic root of 255225731 is about 634.3196308813.

The spelling of 255225731 in words is "two hundred fifty-five million, two hundred twenty-five thousand, seven hundred thirty-one".