201231320 has 32 divisors (see below), whose sum is σ = 453280320. Its totient is φ = 80401920.

The previous prime is 201231307. The next prime is 201231341. The reversal of 201231320 is 23132102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 201231295 and 201231304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41840 + ... + 46400.

It is an arithmetic number, because the mean of its divisors is an integer number (14165010).

Almost surely, 2^201231320 is an apocalyptic number.

201231320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201231320 is an abundant number, since it is smaller than the sum of its proper divisors (252049000).

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

201231320 is a wasteful number, since it uses less digits than its factorization.

201231320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5675 (or 5671 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 201231320 is about 14185.6025603427. The cubic root of 201231320 is about 586.0012269579.

Adding to 201231320 its reverse (23132102), we get a palindrome (224363422).

The spelling of 201231320 in words is "two hundred one million, two hundred thirty-one thousand, three hundred twenty".