31325113420 has 48 divisors (see below), whose sum is σ = 69322095360. Its totient is φ = 11857351104.

The previous prime is 31325113357. The next prime is 31325113423. The reversal of 31325113420 is 2431152313.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31325113423) 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, 299217 + ... + 390103.

It is an arithmetic number, because the mean of its divisors is an integer number (1444210320).

Almost surely, 2^31325113420 is an apocalyptic number.

It is an amenable number.

31325113420 is an abundant number, since it is smaller than the sum of its proper divisors (37996981940).

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

31325113420 is a wasteful number, since it uses less digits than its factorization.

31325113420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91822 (or 91820 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 31325113420 its reverse (2431152313), we get a palindrome (33756265733).

The spelling of 31325113420 in words is "thirty-one billion, three hundred twenty-five million, one hundred thirteen thousand, four hundred twenty".