31224131432 has 16 divisors (see below), whose sum is σ = 63048727140. Its totient is φ = 14411137536.

The previous prime is 31224131431. The next prime is 31224131437. The reversal of 31224131432 is 23413142213.

It can be written as a sum of positive squares in 2 ways, for example, as 30641102116 + 583029316 = 175046^2 + 24146^2 .

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (31224131431) 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, 150115913 + ... + 150116120.

Almost surely, 2^31224131432 is an apocalyptic number.

It is an amenable number.

31224131432 is an abundant number, since it is smaller than the sum of its proper divisors (31824595708).

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

31224131432 is a wasteful number, since it uses less digits than its factorization.

31224131432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300232052 (or 300232048 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

Adding to 31224131432 its reverse (23413142213), we get a palindrome (54637273645).

The spelling of 31224131432 in words is "thirty-one billion, two hundred twenty-four million, one hundred thirty-one thousand, four hundred thirty-two".