31420432232 has 64 divisors (see below), whose sum is σ = 68642640000. Its totient is φ = 13203590400.

The previous prime is 31420432213. The next prime is 31420432237. The reversal of 31420432232 is 23223402413.

It is not an unprimeable number, because it can be changed into a prime (31420432237) 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, 8157107 + ... + 8160957.

It is an arithmetic number, because the mean of its divisors is an integer number (1072541250).

Almost surely, 2^31420432232 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 31420432232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34321320000).

31420432232 is an abundant number, since it is smaller than the sum of its proper divisors (37222207768).

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

31420432232 is a wasteful number, since it uses less digits than its factorization.

31420432232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6666 (or 6662 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 31420432232 its reverse (23223402413), we get a palindrome (54643834645).

The spelling of 31420432232 in words is "thirty-one billion, four hundred twenty million, four hundred thirty-two thousand, two hundred thirty-two".