201931830 has 96 divisors (see below), whose sum is σ = 546594048. Its totient is φ = 51667200.

The previous prime is 201931823. The next prime is 201931837. The reversal of 201931830 is 38139102.

201931830 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (201931823) and next prime (201931837).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201931794 and 201931803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201931837) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 437800 + ... + 438260.

It is an arithmetic number, because the mean of its divisors is an integer number (5693688).

Almost surely, 2^201931830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201931830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273297024).

201931830 is an abundant number, since it is smaller than the sum of its proper divisors (344662218).

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

201931830 is a wasteful number, since it uses less digits than its factorization.

201931830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 659 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 201931830 is about 14210.2719889522. The cubic root of 201931830 is about 586.6804192856.

The spelling of 201931830 in words is "two hundred one million, nine hundred thirty-one thousand, eight hundred thirty".