31253431321144 has 16 divisors (see below), whose sum is σ = 58602542161320. Its totient is φ = 15626086744800.

The previous prime is 31253431321141. The next prime is 31253431321201. The reversal of 31253431321144 is 44112313435213.

It is a super-2 number, since 2×31253431321144² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31253431321141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78403239 + ... + 78800854.

Almost surely, 2^{31253431321144} is an apocalyptic number.

It is an amenable number.

31253431321144 is a deficient number, since it is larger than the sum of its proper divisors (27349110840176).

31253431321144 is a wasteful number, since it uses less digits than its factorization.

31253431321144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157228950 (or 157228946 counting only the distinct ones).

The product of its digits is 103680, while the sum is 37.

Adding to 31253431321144 its reverse (44112313435213), we get a palindrome (75365744756357).

The spelling of 31253431321144 in words is "thirty-one trillion, two hundred fifty-three billion, four hundred thirty-one million, three hundred twenty-one thousand, one hundred forty-four".