31100131420 has 48 divisors (see below), whose sum is σ = 67316066496. Its totient is φ = 12063744000.

The previous prime is 31100131409. The next prime is 31100131427. The reversal of 31100131420 is 2413100113.

It is a junction number, because it is equal to n+sod(n) for n = 31100131394 and 31100131403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31100131427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92901 + ... + 266140.

It is an arithmetic number, because the mean of its divisors is an integer number (1402418052).

Almost surely, 2^31100131420 is an apocalyptic number.

It is an amenable number.

31100131420 is an abundant number, since it is smaller than the sum of its proper divisors (36215935076).

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

31100131420 is a wasteful number, since it uses less digits than its factorization.

31100131420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359182 (or 359180 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31100131420 its reverse (2413100113), we get a palindrome (33513231533).

The spelling of 31100131420 in words is "thirty-one billion, one hundred million, one hundred thirty-one thousand, four hundred twenty".