31631142004 has 48 divisors (see below), whose sum is σ = 73073024640. Its totient is φ = 11598888960.

The previous prime is 31631141977. The next prime is 31631142013. The reversal of 31631142004 is 40024113613.

It is a self number, because there is not a number n which added to its sum of digits gives 31631142004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3015309 + ... + 3025780.

It is an arithmetic number, because the mean of its divisors is an integer number (1522354680).

Almost surely, 2^31631142004 is an apocalyptic number.

31631142004 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31631142004 is an abundant number, since it is smaller than the sum of its proper divisors (41441882636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31631142004 is a wasteful number, since it uses less digits than its factorization.

31631142004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6041128 (or 6041126 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 31631142004 its reverse (40024113613), we get a palindrome (71655255617).

The spelling of 31631142004 in words is "thirty-one billion, six hundred thirty-one million, one hundred forty-two thousand, four".