31432124209 has 2 divisors, whose sum is σ = 31432124210. Its totient is φ = 31432124208.

The previous prime is 31432124201. The next prime is 31432124233. The reversal of 31432124209 is 90242123413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31124016400 + 308107809 = 176420^2 + 17553^2 .

It is a cyclic number.

It is not a de Polignac number, because 31432124209 - 2³ = 31432124201 is a prime.

It is not a weakly prime, because it can be changed into another prime (31432124201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15716062104 + 15716062105.

It is an arithmetic number, because the mean of its divisors is an integer number (15716062105).

Almost surely, 2^31432124209 is an apocalyptic number.

It is an amenable number.

31432124209 is a deficient number, since it is larger than the sum of its proper divisors (1).

31432124209 is an equidigital number, since it uses as much as digits as its factorization.

31432124209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 31432124209 in words is "thirty-one billion, four hundred thirty-two million, one hundred twenty-four thousand, two hundred nine".