31122423420 has 48 divisors (see below), whose sum is σ = 95064859008. Its totient is φ = 7544829760.

The previous prime is 31122423403. The next prime is 31122423463. The reversal of 31122423420 is 2432422113.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23576934 + ... + 23578253.

It is an arithmetic number, because the mean of its divisors is an integer number (1980517896).

Almost surely, 2^31122423420 is an apocalyptic number.

31122423420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31122423420 is an abundant number, since it is smaller than the sum of its proper divisors (63942435588).

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

31122423420 is a wasteful number, since it uses less digits than its factorization.

31122423420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47155210 (or 47155208 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 31122423420 its reverse (2432422113), we get a palindrome (33554845533).

The spelling of 31122423420 in words is "thirty-one billion, one hundred twenty-two million, four hundred twenty-three thousand, four hundred twenty".