231213049 has 2 divisors, whose sum is σ = 231213050. Its totient is φ = 231213048.

The previous prime is 231213041. The next prime is 231213053. The reversal of 231213049 is 940312132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117939600 + 113273449 = 10860^2 + 10643^2 .

It is a cyclic number.

It is not a de Polignac number, because 231213049 - 2³ = 231213041 is a prime.

It is not a weakly prime, because it can be changed into another prime (231213041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115606524 + 115606525.

It is an arithmetic number, because the mean of its divisors is an integer number (115606525).

Almost surely, 2^231213049 is an apocalyptic number.

It is an amenable number.

231213049 is a deficient number, since it is larger than the sum of its proper divisors (1).

231213049 is an equidigital number, since it uses as much as digits as its factorization.

231213049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 231213049 is about 15205.6913358124. The cubic root of 231213049 is about 613.7678186804.

The spelling of 231213049 in words is "two hundred thirty-one million, two hundred thirteen thousand, forty-nine".