231261235 has 4 divisors (see below), whose sum is σ = 277513488. Its totient is φ = 185008984.

The previous prime is 231261227. The next prime is 231261253. The reversal of 231261235 is 532162132.

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 231261235 - 2³ = 231261227 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23126119 + ... + 23126128.

It is an arithmetic number, because the mean of its divisors is an integer number (69378372).

Almost surely, 2^231261235 is an apocalyptic number.

231261235 is a deficient number, since it is larger than the sum of its proper divisors (46252253).

231261235 is an equidigital number, since it uses as much as digits as its factorization.

231261235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46252252.

The product of its digits is 2160, while the sum is 25.

The square root of 231261235 is about 15207.2757257834. The cubic root of 231261235 is about 613.8104531856.

The spelling of 231261235 in words is "two hundred thirty-one million, two hundred sixty-one thousand, two hundred thirty-five".