231365420 has 48 divisors (see below), whose sum is σ = 570816288. Its totient is φ = 77660160.

The previous prime is 231365417. The next prime is 231365429. The reversal of 231365420 is 24563132.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 231365420.

It is not an unprimeable number, because it can be changed into a prime (231365429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37589 + ... + 43308.

It is an arithmetic number, because the mean of its divisors is an integer number (11892006).

Almost surely, 2^231365420 is an apocalyptic number.

231365420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231365420 is an abundant number, since it is smaller than the sum of its proper divisors (339450868).

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

231365420 is a wasteful number, since it uses less digits than its factorization.

231365420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80930 (or 80928 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 231365420 is about 15210.7008385544. The cubic root of 231365420 is about 613.9026148214.

The spelling of 231365420 in words is "two hundred thirty-one million, three hundred sixty-five thousand, four hundred twenty".