396236531 has 2 divisors, whose sum is σ = 396236532. Its totient is φ = 396236530.

The previous prime is 396236497. The next prime is 396236539. The reversal of 396236531 is 135632693.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 396236531 - 2²² = 392042227 is a prime.

It is a super-2 number, since 2×396236531² = 314006776997827922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (396236539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198118265 + 198118266.

It is an arithmetic number, because the mean of its divisors is an integer number (198118266).

Almost surely, 2^396236531 is an apocalyptic number.

396236531 is a deficient number, since it is larger than the sum of its proper divisors (1).

396236531 is an equidigital number, since it uses as much as digits as its factorization.

396236531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 38.

The square root of 396236531 is about 19905.6909199354. The cubic root of 396236531 is about 734.4882247297.

The spelling of 396236531 in words is "three hundred ninety-six million, two hundred thirty-six thousand, five hundred thirty-one".