31240402012 has 6 divisors (see below), whose sum is σ = 54670703528. Its totient is φ = 15620201004.

The previous prime is 31240401967. The next prime is 31240402099. The reversal of 31240402012 is 21020404213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3905050248 + ... + 3905050255.

Almost surely, 2^31240402012 is an apocalyptic number.

It is an amenable number.

31240402012 is a deficient number, since it is larger than the sum of its proper divisors (23430301516).

31240402012 is a wasteful number, since it uses less digits than its factorization.

31240402012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7810100507 (or 7810100505 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 31240402012 its reverse (21020404213), we get a palindrome (52260806225).

The spelling of 31240402012 in words is "thirty-one billion, two hundred forty million, four hundred two thousand, twelve".