31424031200 has 72 divisors (see below), whose sum is σ = 76865627160. Its totient is φ = 12544755200.

The previous prime is 31424031187. The next prime is 31424031229. The reversal of 31424031200 is 213042413.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 368615 + ... + 445785.

It is an arithmetic number, because the mean of its divisors is an integer number (1067578155).

Almost surely, 2^31424031200 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 31424031200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38432813580).

31424031200 is an abundant number, since it is smaller than the sum of its proper divisors (45441595960).

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

31424031200 is a wasteful number, since it uses less digits than its factorization.

31424031200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77700 (or 77687 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31424031200 its reverse (213042413), we get a palindrome (31637073613).

The spelling of 31424031200 in words is "thirty-one billion, four hundred twenty-four million, thirty-one thousand, two hundred".