231668580 has 288 divisors, whose sum is σ = 802787328. Its totient is φ = 49420800.

The previous prime is 231668543. The next prime is 231668599. The reversal of 231668580 is 85866132.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3457707 + ... + 3457773.

It is an arithmetic number, because the mean of its divisors is an integer number (2787456).

Almost surely, 2^231668580 is an apocalyptic number.

231668580 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 231668580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401393664).

231668580 is an abundant number, since it is smaller than the sum of its proper divisors (571118748).

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

231668580 is a wasteful number, since it uses less digits than its factorization.

231668580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 231668580 is about 15220.6629290580. The cubic root of 231668580 is about 614.1706316644.

The spelling of 231668580 in words is "two hundred thirty-one million, six hundred sixty-eight thousand, five hundred eighty".