425885531 has 2 divisors, whose sum is σ = 425885532. Its totient is φ = 425885530.

The previous prime is 425885507. The next prime is 425885543. The reversal of 425885531 is 135588524.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425885531 is a prime.

It is a super-2 number, since 2×425885531² = 362756971030303922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (425885501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212942765 + 212942766.

It is an arithmetic number, because the mean of its divisors is an integer number (212942766).

Almost surely, 2^425885531 is an apocalyptic number.

425885531 is a deficient number, since it is larger than the sum of its proper divisors (1).

425885531 is an equidigital number, since it uses as much as digits as its factorization.

425885531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192000, while the sum is 41.

The square root of 425885531 is about 20636.9942336572. The cubic root of 425885531 is about 752.3691194472.

The spelling of 425885531 in words is "four hundred twenty-five million, eight hundred eighty-five thousand, five hundred thirty-one".