425666531 has 2 divisors, whose sum is σ = 425666532. Its totient is φ = 425666530.

The previous prime is 425666453. The next prime is 425666567. The reversal of 425666531 is 135666524.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 425666531 - 2¹⁰ = 425665507 is a prime.

It is a super-2 number, since 2×425666531² = 362383991227147922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (425666581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212833265 + 212833266.

It is an arithmetic number, because the mean of its divisors is an integer number (212833266).

Almost surely, 2^425666531 is an apocalyptic number.

425666531 is a deficient number, since it is larger than the sum of its proper divisors (1).

425666531 is an equidigital number, since it uses as much as digits as its factorization.

425666531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 38.

The square root of 425666531 is about 20631.6875461025. The cubic root of 425666531 is about 752.2401355804.

The spelling of 425666531 in words is "four hundred twenty-five million, six hundred sixty-six thousand, five hundred thirty-one".