231625213 has 2 divisors, whose sum is σ = 231625214. Its totient is φ = 231625212.

The previous prime is 231625201. The next prime is 231625223. The reversal of 231625213 is 312526132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222516889 + 9108324 = 14917^2 + 3018^2 .

It is a cyclic number.

It is not a de Polignac number, because 231625213 - 2¹⁷ = 231494141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231625223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115812606 + 115812607.

It is an arithmetic number, because the mean of its divisors is an integer number (115812607).

Almost surely, 2^231625213 is an apocalyptic number.

It is an amenable number.

231625213 is a deficient number, since it is larger than the sum of its proper divisors (1).

231625213 is an equidigital number, since it uses as much as digits as its factorization.

231625213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 25.

The square root of 231625213 is about 15219.2382529481. The cubic root of 231625213 is about 614.1323062257.

The spelling of 231625213 in words is "two hundred thirty-one million, six hundred twenty-five thousand, two hundred thirteen".