31422900 has 36 divisors (see below), whose sum is σ = 90917792. Its totient is φ = 8379360.

The previous prime is 31422893. The next prime is 31422901. The reversal of 31422900 is 922413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31422901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52072 + ... + 52671.

Almost surely, 2^31422900 is an apocalyptic number.

31422900 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31422900 is an abundant number, since it is smaller than the sum of its proper divisors (59494892).

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

31422900 is a wasteful number, since it uses less digits than its factorization.

31422900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104760 (or 104753 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 31422900 is about 5605.6132581547. The cubic root of 31422900 is about 315.5601020049.

The spelling of 31422900 in words is "thirty-one million, four hundred twenty-two thousand, nine hundred".