31145106144 has 24 divisors (see below), whose sum is σ = 81755903880. Its totient is φ = 10381702016.

The previous prime is 31145106143. The next prime is 31145106221. The reversal of 31145106144 is 44160154113.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31145106143) 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, 162213999 + ... + 162214190.

It is an arithmetic number, because the mean of its divisors is an integer number (3406495995).

Almost surely, 2^31145106144 is an apocalyptic number.

It is an amenable number.

31145106144 is an abundant number, since it is smaller than the sum of its proper divisors (50610797736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31145106144 is a wasteful number, since it uses less digits than its factorization.

31145106144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324428202 (or 324428194 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 31145106144 in words is "thirty-one billion, one hundred forty-five million, one hundred six thousand, one hundred forty-four".