31427151892 has 6 divisors (see below), whose sum is σ = 54997515818. Its totient is φ = 15713575944.

The previous prime is 31427151863. The next prime is 31427151893. The reversal of 31427151892 is 29815172413.

It can be written as a sum of positive squares in only one way, i.e., 29612903056 + 1814248836 = 172084^2 + 42594^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31427151893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3928393983 + ... + 3928393990.

Almost surely, 2^31427151892 is an apocalyptic number.

It is an amenable number.

31427151892 is a deficient number, since it is larger than the sum of its proper divisors (23570363926).

31427151892 is a wasteful number, since it uses less digits than its factorization.

31427151892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7856787977 (or 7856787975 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The spelling of 31427151892 in words is "thirty-one billion, four hundred twenty-seven million, one hundred fifty-one thousand, eight hundred ninety-two".