231213570 has 64 divisors (see below), whose sum is σ = 636698880. Its totient is φ = 52639488.

The previous prime is 231213551. The next prime is 231213571. The reversal of 231213570 is 75312132.

It is a self number, because there is not a number n which added to its sum of digits gives 231213570.

It is not an unprimeable number, because it can be changed into a prime (231213571) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54444 + ... + 58536.

It is an arithmetic number, because the mean of its divisors is an integer number (9948420).

Almost surely, 2^231213570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231213570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318349440).

231213570 is an abundant number, since it is smaller than the sum of its proper divisors (405485310).

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

231213570 is a wasteful number, since it uses less digits than its factorization.

231213570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4379.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 231213570 is about 15205.7084675460. The cubic root of 231213570 is about 613.7682796878.

The spelling of 231213570 in words is "two hundred thirty-one million, two hundred thirteen thousand, five hundred seventy".