31420200 has 96 divisors (see below), whose sum is σ = 111332160. Its totient is φ = 7180800.

The previous prime is 31420189. The next prime is 31420217. The reversal of 31420200 is 202413.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 460 + ... + 7940.

It is an arithmetic number, because the mean of its divisors is an integer number (1159710).

Almost surely, 2^31420200 is an apocalyptic number.

31420200 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31420200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55666080).

31420200 is an abundant number, since it is smaller than the sum of its proper divisors (79911960).

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

31420200 is a wasteful number, since it uses less digits than its factorization.

31420200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7507 (or 7498 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 31420200 is about 5605.3724229528. The cubic root of 31420200 is about 315.5510636212.

Adding to 31420200 its reverse (202413), we get a palindrome (31622613).

The spelling of 31420200 in words is "thirty-one million, four hundred twenty thousand, two hundred".