231501253 has 2 divisors, whose sum is σ = 231501254. Its totient is φ = 231501252.

The previous prime is 231501227. The next prime is 231501269. The reversal of 231501253 is 352105132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219543489 + 11957764 = 14817^2 + 3458^2 .

It is a cyclic number.

It is not a de Polignac number, because 231501253 - 2²¹ = 229404101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231501553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115750626 + 115750627.

It is an arithmetic number, because the mean of its divisors is an integer number (115750627).

Almost surely, 2^231501253 is an apocalyptic number.

It is an amenable number.

231501253 is a deficient number, since it is larger than the sum of its proper divisors (1).

231501253 is an equidigital number, since it uses as much as digits as its factorization.

231501253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 231501253 is about 15215.1652307821. The cubic root of 231501253 is about 614.0227306110.

Adding to 231501253 its reverse (352105132), we get a palindrome (583606385).

The spelling of 231501253 in words is "two hundred thirty-one million, five hundred one thousand, two hundred fifty-three".