31541245216 has 24 divisors (see below), whose sum is σ = 66873506364. Its totient is φ = 14557497600.

The previous prime is 31541245199. The next prime is 31541245217. The reversal of 31541245216 is 61254214513.

It can be written as a sum of positive squares in 2 ways, for example, as 23961801616 + 7579443600 = 154796^2 + 87060^2 .

It is not an unprimeable number, because it can be changed into a prime (31541245217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37909735 + ... + 37910566.

Almost surely, 2^31541245216 is an apocalyptic number.

It is an amenable number.

31541245216 is an abundant number, since it is smaller than the sum of its proper divisors (35332261148).

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

31541245216 is a wasteful number, since it uses less digits than its factorization.

31541245216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75820324 (or 75820316 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

Adding to 31541245216 its reverse (61254214513), we get a palindrome (92795459729).

The spelling of 31541245216 in words is "thirty-one billion, five hundred forty-one million, two hundred forty-five thousand, two hundred sixteen".