31001042144 has 48 divisors (see below), whose sum is σ = 61219987920. Its totient is φ = 15453204480.

The previous prime is 31001042129. The next prime is 31001042153. The reversal of 31001042144 is 44124010013.

It is a super-2 number, since 2×31001042144² (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, 26249234 + ... + 26250414.

It is an arithmetic number, because the mean of its divisors is an integer number (1275416415).

Almost surely, 2^31001042144 is an apocalyptic number.

It is an amenable number.

31001042144 is a deficient number, since it is larger than the sum of its proper divisors (30218945776).

31001042144 is a wasteful number, since it uses less digits than its factorization.

31001042144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003 (or 2995 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 31001042144 its reverse (44124010013), we get a palindrome (75125052157).

The spelling of 31001042144 in words is "thirty-one billion, one million, forty-two thousand, one hundred forty-four".