450685531 has 2 divisors, whose sum is σ = 450685532. Its totient is φ = 450685530.

The previous prime is 450685519. The next prime is 450685561. The reversal of 450685531 is 135586054.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 450685531 - 2²¹ = 448588379 is a prime.

It is a super-2 number, since 2×450685531² = 406234895705503922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (450685561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225342765 + 225342766.

It is an arithmetic number, because the mean of its divisors is an integer number (225342766).

Almost surely, 2^450685531 is an apocalyptic number.

450685531 is a deficient number, since it is larger than the sum of its proper divisors (1).

450685531 is an equidigital number, since it uses as much as digits as its factorization.

450685531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 450685531 is about 21229.3554070772. The cubic root of 450685531 is about 766.6983674563.

The spelling of 450685531 in words is "four hundred fifty million, six hundred eighty-five thousand, five hundred thirty-one".