31245425424 has 30 divisors (see below), whose sum is σ = 87443795166. Its totient is φ = 10415141760.

The previous prime is 31245425423. The next prime is 31245425441. The reversal of 31245425424 is 42452454213.

31245425424 is a `hidden beast` number, since 31 + 2 + 45 + 42 + 542 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 26166297600 + 5079127824 = 161760^2 + 71268^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (31245425423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108490917 + ... + 108491204.

Almost surely, 2^31245425424 is an apocalyptic number.

It is an amenable number.

31245425424 is an abundant number, since it is smaller than the sum of its proper divisors (56198369742).

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

31245425424 is a wasteful number, since it uses less digits than its factorization.

31245425424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216982135 (or 216982126 counting only the distinct ones).

The product of its digits is 153600, while the sum is 36.

Adding to 31245425424 its reverse (42452454213), we get a palindrome (73697879637).

The spelling of 31245425424 in words is "thirty-one billion, two hundred forty-five million, four hundred twenty-five thousand, four hundred twenty-four".