253231091 has 4 divisors (see below), whose sum is σ = 256282152. Its totient is φ = 250180032.

The previous prime is 253231073. The next prime is 253231151. The reversal of 253231091 is 190132352.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 253231091 - 2¹⁴ = 253214707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253231091.

It is not an unprimeable number, because it can be changed into a prime (253231001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1525406 + ... + 1525571.

It is an arithmetic number, because the mean of its divisors is an integer number (64070538).

Almost surely, 2^253231091 is an apocalyptic number.

253231091 is a deficient number, since it is larger than the sum of its proper divisors (3051061).

253231091 is an equidigital number, since it uses as much as digits as its factorization.

253231091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3051060.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 253231091 is about 15913.2363458851. The cubic root of 253231091 is about 632.6628625483.

The spelling of 253231091 in words is "two hundred fifty-three million, two hundred thirty-one thousand, ninety-one".