201931620 has 96 divisors (see below), whose sum is σ = 649313280. Its totient is φ = 46373760.

The previous prime is 201931589. The next prime is 201931633. The reversal of 201931620 is 26139102.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4489 + ... + 20591.

It is an arithmetic number, because the mean of its divisors is an integer number (6763680).

Almost surely, 2^201931620 is an apocalyptic number.

201931620 is a gapful number since it is divisible by the number (20) 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 201931620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324656640).

201931620 is an abundant number, since it is smaller than the sum of its proper divisors (447381660).

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

201931620 is a wasteful number, since it uses less digits than its factorization.

201931620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16145 (or 16143 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 201931620 is about 14210.2645999292. The cubic root of 201931620 is about 586.6802159118.

The spelling of 201931620 in words is "two hundred one million, nine hundred thirty-one thousand, six hundred twenty".