231250213 has 4 divisors (see below), whose sum is σ = 233848620. Its totient is φ = 228651808.

The previous prime is 231250193. The next prime is 231250241. The reversal of 231250213 is 312052132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103266244 + 127983969 = 10162^2 + 11313^2 .

It is a cyclic number.

It is not a de Polignac number, because 231250213 - 2⁵ = 231250181 is a prime.

It is a super-2 number, since 2×231250213² = 106953322025090738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231253213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1299070 + ... + 1299247.

It is an arithmetic number, because the mean of its divisors is an integer number (58462155).

Almost surely, 2^231250213 is an apocalyptic number.

It is an amenable number.

231250213 is a deficient number, since it is larger than the sum of its proper divisors (2598407).

231250213 is an equidigital number, since it uses as much as digits as its factorization.

231250213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2598406.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 231250213 is about 15206.9133291408. The cubic root of 231250213 is about 613.8007015494.

It can be divided in two parts, 2312 and 50213, that added together give a palindrome (52525).

The spelling of 231250213 in words is "two hundred thirty-one million, two hundred fifty thousand, two hundred thirteen".