31000270642 has 64 divisors (see below), whose sum is σ = 54365810688. Its totient is φ = 13115344000.

The previous prime is 31000270633. The next prime is 31000270657. The reversal of 31000270642 is 24607200013.

It is a super-2 number, since 2×31000270642² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8939793 + ... + 8943259.

It is an arithmetic number, because the mean of its divisors is an integer number (849465792).

Almost surely, 2^31000270642 is an apocalyptic number.

31000270642 is a deficient number, since it is larger than the sum of its proper divisors (23365540046).

31000270642 is a wasteful number, since it uses less digits than its factorization.

31000270642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3975.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 31000270642 its reverse (24607200013), we get a palindrome (55607470655).

The spelling of 31000270642 in words is "thirty-one billion, two hundred seventy thousand, six hundred forty-two".