31545043144 has 8 divisors (see below), whose sum is σ = 59146955910. Its totient is φ = 15772521568.

The previous prime is 31545043133. The next prime is 31545043181. The reversal of 31545043144 is 44134054513.

It can be written as a sum of positive squares in only one way, i.e., 16221079044 + 15323964100 = 127362^2 + 123790^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1971565189 + ... + 1971565204.

Almost surely, 2^31545043144 is an apocalyptic number.

It is an amenable number.

31545043144 is a deficient number, since it is larger than the sum of its proper divisors (27601912766).

31545043144 is a wasteful number, since it uses less digits than its factorization.

31545043144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3943130399 (or 3943130395 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 31545043144 its reverse (44134054513), we get a palindrome (75679097657).

The spelling of 31545043144 in words is "thirty-one billion, five hundred forty-five million, forty-three thousand, one hundred forty-four".