31972303144 has 8 divisors (see below), whose sum is σ = 59948068410. Its totient is φ = 15986151568.

The previous prime is 31972303141. The next prime is 31972303147. The reversal of 31972303144 is 44130327913.

It is an interprime number because it is at equal distance from previous prime (31972303141) and next prime (31972303147).

It can be written as a sum of positive squares in only one way, i.e., 31694680900 + 277622244 = 178030^2 + 16662^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (31972303141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1998268939 + ... + 1998268954.

Almost surely, 2^31972303144 is an apocalyptic number.

It is an amenable number.

31972303144 is a deficient number, since it is larger than the sum of its proper divisors (27975765266).

31972303144 is a wasteful number, since it uses less digits than its factorization.

31972303144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3996537899 (or 3996537895 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The spelling of 31972303144 in words is "thirty-one billion, nine hundred seventy-two million, three hundred three thousand, one hundred forty-four".