31123501344 has 192 divisors, whose sum is σ = 100403210880. Its totient is φ = 9317514240.

The previous prime is 31123501301. The next prime is 31123501397. The reversal of 31123501344 is 44310532113.

It is a happy number.

31123501344 is a `hidden beast` number, since 3 + 1 + 123 + 501 + 34 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 378139 + ... + 453029.

It is an arithmetic number, because the mean of its divisors is an integer number (522933390).

Almost surely, 2^31123501344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31123501344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50201605440).

31123501344 is an abundant number, since it is smaller than the sum of its proper divisors (69279709536).

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

31123501344 is a wasteful number, since it uses less digits than its factorization.

31123501344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74960 (or 74946 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The spelling of 31123501344 in words is "thirty-one billion, one hundred twenty-three million, five hundred one thousand, three hundred forty-four".