31232145100 has 36 divisors (see below), whose sum is σ = 72987123664. Its totient is φ = 11531868480.

The previous prime is 31232145079. The next prime is 31232145101. The reversal of 31232145100 is 154123213.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31232145101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12011064 + ... + 12013663.

Almost surely, 2^31232145100 is an apocalyptic number.

It is an amenable number.

31232145100 is an abundant number, since it is smaller than the sum of its proper divisors (41754978564).

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

31232145100 is a wasteful number, since it uses less digits than its factorization.

31232145100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24024754 (or 24024747 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 31232145100 its reverse (154123213), we get a palindrome (31386268313).

The spelling of 31232145100 in words is "thirty-one billion, two hundred thirty-two million, one hundred forty-five thousand, one hundred".