31423203200 has 96 divisors (see below), whose sum is σ = 81710823000. Its totient is φ = 11907717120.

The previous prime is 31423203197. The next prime is 31423203241. The reversal of 31423203200 is 230232413.

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, 197615 + ... + 319214.

Almost surely, 2^31423203200 is an apocalyptic number.

It is an amenable number.

31423203200 is an abundant number, since it is smaller than the sum of its proper divisors (50287619800).

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

31423203200 is a wasteful number, since it uses less digits than its factorization.

31423203200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516872 (or 516855 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 31423203200 its reverse (230232413), we get a palindrome (31653435613).

The spelling of 31423203200 in words is "thirty-one billion, four hundred twenty-three million, two hundred three thousand, two hundred".