31300400124 has 108 divisors (see below), whose sum is σ = 92083773600. Its totient is φ = 8938532736.

The previous prime is 31300400123. The next prime is 31300400141. The reversal of 31300400124 is 42100400313.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31300400097 and 31300400106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31300400123) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5499072 + ... + 5504760.

Almost surely, 2^31300400124 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 31300400124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46041886800).

31300400124 is an abundant number, since it is smaller than the sum of its proper divisors (60783373476).

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

31300400124 is a wasteful number, since it uses less digits than its factorization.

31300400124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8832 (or 8820 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 31300400124 its reverse (42100400313), we get a palindrome (73400800437).

The spelling of 31300400124 in words is "thirty-one billion, three hundred million, four hundred thousand, one hundred twenty-four".