31442200 has 24 divisors (see below), whose sum is σ = 73103580. Its totient is φ = 12576800.

The previous prime is 31442189. The next prime is 31442239. The reversal of 31442200 is 224413.

It is a super-2 number, since 2×31442200² = 1977223881680000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78406 + ... + 78805.

Almost surely, 2^31442200 is an apocalyptic number.

It is an amenable number.

31442200 is an abundant number, since it is smaller than the sum of its proper divisors (41661380).

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

31442200 is a wasteful number, since it uses less digits than its factorization.

31442200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157227 (or 157218 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 31442200 is about 5607.3344826218. The cubic root of 31442200 is about 315.6246946375.

Adding to 31442200 its reverse (224413), we get a palindrome (31666613).

The spelling of 31442200 in words is "thirty-one million, four hundred forty-two thousand, two hundred".