31402331247 has 48 divisors (see below), whose sum is σ = 49021327872. Its totient is φ = 17828254080.

The previous prime is 31402331221. The next prime is 31402331291. The reversal of 31402331247 is 74213320413.

It is not a de Polignac number, because 31402331247 - 2⁸ = 31402330991 is a prime.

It is a super-2 number, since 2×31402331247² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31402331047) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30398643 + ... + 30399675.

It is an arithmetic number, because the mean of its divisors is an integer number (1021277664).

Almost surely, 2^31402331247 is an apocalyptic number.

31402331247 is a deficient number, since it is larger than the sum of its proper divisors (17618996625).

31402331247 is a wasteful number, since it uses less digits than its factorization.

31402331247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188 (or 2181 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The spelling of 31402331247 in words is "thirty-one billion, four hundred two million, three hundred thirty-one thousand, two hundred forty-seven".