51031431412 has 24 divisors (see below), whose sum is σ = 98773938536. Its totient is φ = 22916400768.

The previous prime is 51031431391. The next prime is 51031431431. The reversal of 51031431412 is 21413413015.

It can be written as a sum of positive squares in 4 ways, for example, as 4048267876 + 46983163536 = 63626^2 + 216756^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13259883 + ... + 13263730.

Almost surely, 2^51031431412 is an apocalyptic number.

51031431412 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51031431412 is a deficient number, since it is larger than the sum of its proper divisors (47742507124).

51031431412 is a wasteful number, since it uses less digits than its factorization.

51031431412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26523667 (or 26523665 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 51031431412 its reverse (21413413015), we get a palindrome (72444844427).

The spelling of 51031431412 in words is "fifty-one billion, thirty-one million, four hundred thirty-one thousand, four hundred twelve".