31201032320 has 32 divisors (see below), whose sum is σ = 74589969420. Its totient is φ = 12480412672.

The previous prime is 31201032287. The next prime is 31201032323. The reversal of 31201032320 is 2323010213.

It can be written as a sum of positive squares in 2 ways, for example, as 31029527104 + 171505216 = 176152^2 + 13096^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (31201032323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24375167 + ... + 24376446.

Almost surely, 2^31201032320 is an apocalyptic number.

It is an amenable number.

31201032320 is an abundant number, since it is smaller than the sum of its proper divisors (43388937100).

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

31201032320 is an equidigital number, since it uses as much as digits as its factorization.

31201032320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48751632 (or 48751620 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31201032320 its reverse (2323010213), we get a palindrome (33524042533).

The spelling of 31201032320 in words is "thirty-one billion, two hundred one million, thirty-two thousand, three hundred twenty".