231572262109 has 2 divisors, whose sum is σ = 231572262110. Its totient is φ = 231572262108.

The previous prime is 231572262071. The next prime is 231572262133. The reversal of 231572262109 is 901262275132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131191013209 + 100381248900 = 362203^2 + 316830^2 .

It is a cyclic number.

It is not a de Polignac number, because 231572262109 - 2¹⁵ = 231572229341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231572262139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115786131054 + 115786131055.

It is an arithmetic number, because the mean of its divisors is an integer number (115786131055).

Almost surely, 2^231572262109 is an apocalyptic number.

It is an amenable number.

231572262109 is a deficient number, since it is larger than the sum of its proper divisors (1).

231572262109 is an equidigital number, since it uses as much as digits as its factorization.

231572262109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 231572262109 in words is "two hundred thirty-one billion, five hundred seventy-two million, two hundred sixty-two thousand, one hundred nine".