31242430400 has 84 divisors (see below), whose sum is σ = 76930334328. Its totient is φ = 12488125440.

The previous prime is 31242430399. The next prime is 31242430469. The reversal of 31242430400 is 403424213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2549087 + ... + 2561313.

Almost surely, 2^31242430400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31242430400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38465167164).

31242430400 is an abundant number, since it is smaller than the sum of its proper divisors (45687903928).

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

31242430400 is a wasteful number, since it uses less digits than its factorization.

31242430400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13846 (or 13831 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 31242430400 its reverse (403424213), we get a palindrome (31645854613).

The spelling of 31242430400 in words is "thirty-one billion, two hundred forty-two million, four hundred thirty thousand, four hundred".