31150420432 has 80 divisors (see below), whose sum is σ = 64115896320. Its totient is φ = 14637081600.

The previous prime is 31150420429. The next prime is 31150420453. The reversal of 31150420432 is 23402405113.

It is a junction number, because it is equal to n+sod(n) for n = 31150420397 and 31150420406.

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, 4531494 + ... + 4538362.

It is an arithmetic number, because the mean of its divisors is an integer number (801448704).

Almost surely, 2^31150420432 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 31150420432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32057948160).

31150420432 is an abundant number, since it is smaller than the sum of its proper divisors (32965475888).

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

31150420432 is a wasteful number, since it uses less digits than its factorization.

31150420432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7172 (or 7166 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 31150420432 its reverse (23402405113), we get a palindrome (54552825545).

The spelling of 31150420432 in words is "thirty-one billion, one hundred fifty million, four hundred twenty thousand, four hundred thirty-two".