31409409529 has 9 divisors (see below), whose sum is σ = 32460978351. Its totient is φ = 30390885960.

The previous prime is 31409409527. The next prime is 31409409539. The reversal of 31409409529 is 92590490413.

The square root of 31409409529 is 177227.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 18310149225 + 13099260304 = 135315^2 + 114452^2 .

It is not a de Polignac number, because 31409409529 - 2¹ = 31409409527 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31409409527) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5491179 + ... + 5496895.

Almost surely, 2^31409409529 is an apocalyptic number.

31409409529 is the 177227-th square number.

31409409529 is the 88614-th centered octagonal number.

It is an amenable number.

31409409529 is a deficient number, since it is larger than the sum of its proper divisors (1051568822).

31409409529 is an frugal number, since it uses more digits than its factorization.

31409409529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11496 (or 5748 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 31409409529 in words is "thirty-one billion, four hundred nine million, four hundred nine thousand, five hundred twenty-nine".