233256409 has 4 divisors (see below), whose sum is σ = 243398016. Its totient is φ = 223114804.

The previous prime is 233256391. The next prime is 233256433. The reversal of 233256409 is 904652332.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 233256409 - 2⁷ = 233256281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (233256449) 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, 5070769 + ... + 5070814.

It is an arithmetic number, because the mean of its divisors is an integer number (60849504).

Almost surely, 2^233256409 is an apocalyptic number.

It is an amenable number.

233256409 is a deficient number, since it is larger than the sum of its proper divisors (10141607).

233256409 is a wasteful number, since it uses less digits than its factorization.

233256409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10141606.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 233256409 is about 15272.7341691002. The cubic root of 233256409 is about 615.5705890534.

The spelling of 233256409 in words is "two hundred thirty-three million, two hundred fifty-six thousand, four hundred nine".