231448621 has 2 divisors, whose sum is σ = 231448622. Its totient is φ = 231448620.

The previous prime is 231448603. The next prime is 231448627. The reversal of 231448621 is 126844132.

231448621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227587396 + 3861225 = 15086^2 + 1965^2 .

It is a cyclic number.

It is not a de Polignac number, because 231448621 - 2⁵ = 231448589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231448627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115724310 + 115724311.

It is an arithmetic number, because the mean of its divisors is an integer number (115724311).

Almost surely, 2^231448621 is an apocalyptic number.

It is an amenable number.

231448621 is a deficient number, since it is larger than the sum of its proper divisors (1).

231448621 is an equidigital number, since it uses as much as digits as its factorization.

231448621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 31.

The square root of 231448621 is about 15213.4355423093. The cubic root of 231448621 is about 613.9761942268.

The spelling of 231448621 in words is "two hundred thirty-one million, four hundred forty-eight thousand, six hundred twenty-one".