31542443012 has 6 divisors (see below), whose sum is σ = 55199275278. Its totient is φ = 15771221504.

The previous prime is 31542442993. The next prime is 31542443027. The reversal of 31542443012 is 21034424513.

It can be written as a sum of positive squares in only one way, i.e., 25094995396 + 6447447616 = 158414^2 + 80296^2 .

It is a super-2 number, since 2×31542443012² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3942805373 + ... + 3942805380.

It is an arithmetic number, because the mean of its divisors is an integer number (9199879213).

Almost surely, 2^31542443012 is an apocalyptic number.

It is an amenable number.

31542443012 is a deficient number, since it is larger than the sum of its proper divisors (23656832266).

31542443012 is a wasteful number, since it uses less digits than its factorization.

31542443012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7885610757 (or 7885610755 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 31542443012 its reverse (21034424513), we get a palindrome (52576867525).

The spelling of 31542443012 in words is "thirty-one billion, five hundred forty-two million, four hundred forty-three thousand, twelve".