31403323032 has 128 divisors (see below), whose sum is σ = 86625028800. Its totient is φ = 9442377728.

The previous prime is 31403323031. The next prime is 31403323043. The reversal of 31403323032 is 23032330413.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 31403322993 and 31403323011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31403323031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1611298 + ... + 1630670.

Almost surely, 2^31403323032 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 31403323032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43312514400).

31403323032 is an abundant number, since it is smaller than the sum of its proper divisors (55221705768).

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

31403323032 is a wasteful number, since it uses less digits than its factorization.

31403323032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19565 (or 19561 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 24.

Adding to 31403323032 its reverse (23032330413), we get a palindrome (54435653445).

The spelling of 31403323032 in words is "thirty-one billion, four hundred three million, three hundred twenty-three thousand, thirty-two".