31130163144 has 24 divisors (see below), whose sum is σ = 84310858710. Its totient is φ = 10376721024.

The previous prime is 31130163091. The next prime is 31130163161. The reversal of 31130163144 is 44136103113.

31130163144 is a `hidden beast` number, since 311 + 30 + 1 + 6 + 314 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23366791044 + 7763372100 = 152862^2 + 88110^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 216181617 + ... + 216181760.

Almost surely, 2^31130163144 is an apocalyptic number.

It is an amenable number.

31130163144 is an abundant number, since it is smaller than the sum of its proper divisors (53180695566).

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

31130163144 is a wasteful number, since it uses less digits than its factorization.

31130163144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432363389 (or 432363382 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 31130163144 its reverse (44136103113), we get a palindrome (75266266257).

The spelling of 31130163144 in words is "thirty-one billion, one hundred thirty million, one hundred sixty-three thousand, one hundred forty-four".