31564429140 has 24 divisors (see below), whose sum is σ = 88380401760. Its totient is φ = 8417181088.

The previous prime is 31564429129. The next prime is 31564429163. The reversal of 31564429140 is 4192446513.

It is a super-2 number, since 2×31564429140² (a number of 22 digits) contains 22 as substring.

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, 263036850 + ... + 263036969.

It is an arithmetic number, because the mean of its divisors is an integer number (3682516740).

Almost surely, 2^31564429140 is an apocalyptic number.

31564429140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31564429140 is an abundant number, since it is smaller than the sum of its proper divisors (56815972620).

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

31564429140 is a wasteful number, since it uses less digits than its factorization.

31564429140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526073831 (or 526073829 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 31564429140 in words is "thirty-one billion, five hundred sixty-four million, four hundred twenty-nine thousand, one hundred forty".