31282309947 has 32 divisors (see below), whose sum is σ = 49334330880. Its totient is φ = 17251395840.

The previous prime is 31282309879. The next prime is 31282309987. The reversal of 31282309947 is 74990328213.

It is not a de Polignac number, because 31282309947 - 2²⁷ = 31148092219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31282309896 and 31282309905.

It is not an unprimeable number, because it can be changed into a prime (31282309987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1495672 + ... + 1516442.

It is an arithmetic number, because the mean of its divisors is an integer number (1541697840).

Almost surely, 2^31282309947 is an apocalyptic number.

31282309947 is a deficient number, since it is larger than the sum of its proper divisors (18052020933).

31282309947 is a wasteful number, since it uses less digits than its factorization.

31282309947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23283.

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 31282309947 in words is "thirty-one billion, two hundred eighty-two million, three hundred nine thousand, nine hundred forty-seven".