233825409 has 6 divisors (see below), whose sum is σ = 337747826. Its totient is φ = 155883600.

The previous prime is 233825401. The next prime is 233825441. The reversal of 233825409 is 904528332.

233825409 is a `hidden beast` number, since 2 + 33 + 82 + 540 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 213978384 + 19847025 = 14628^2 + 4455^2 .

It is not a de Polignac number, because 233825409 - 2³ = 233825401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (233825401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12990292 + ... + 12990309.

Almost surely, 2^233825409 is an apocalyptic number.

It is an amenable number.

233825409 is a deficient number, since it is larger than the sum of its proper divisors (103922417).

233825409 is a wasteful number, since it uses less digits than its factorization.

233825409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25980607 (or 25980604 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 233825409 is about 15291.3507905613. The cubic root of 233825409 is about 616.0707185704.

The spelling of 233825409 in words is "two hundred thirty-three million, eight hundred twenty-five thousand, four hundred nine".