231411720 has 128 divisors (see below), whose sum is σ = 712592640. Its totient is φ = 60103680.

The previous prime is 231411707. The next prime is 231411743. The reversal of 231411720 is 27114132.

It is a super-3 number, since 3×231411720³ (a number of 26 digits) contains 333 as substring.

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, 1337554 + ... + 1337726.

It is an arithmetic number, because the mean of its divisors is an integer number (5567130).

Almost surely, 2^231411720 is an apocalyptic number.

231411720 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 231411720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356296320).

231411720 is an abundant number, since it is smaller than the sum of its proper divisors (481180920).

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

231411720 is a wasteful number, since it uses less digits than its factorization.

231411720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 231411720 is about 15212.2227172757. Note that the first 3 decimals coincide. The cubic root of 231411720 is about 613.9435627373.

Adding to 231411720 its reverse (27114132), we get a palindrome (258525852).

The spelling of 231411720 in words is "two hundred thirty-one million, four hundred eleven thousand, seven hundred twenty".