231909442 has 8 divisors (see below), whose sum is σ = 349250832. Its totient is φ = 115492500.

The previous prime is 231909413. The next prime is 231909487. The reversal of 231909442 is 244909132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 231909398 and 231909407.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230484 + ... + 231487.

It is an arithmetic number, because the mean of its divisors is an integer number (43656354).

Almost surely, 2^231909442 is an apocalyptic number.

231909442 is a deficient number, since it is larger than the sum of its proper divisors (117341390).

231909442 is a wasteful number, since it uses less digits than its factorization.

231909442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462224.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 231909442 is about 15228.5732095952. The cubic root of 231909442 is about 614.3834056328.

The spelling of 231909442 in words is "two hundred thirty-one million, nine hundred nine thousand, four hundred forty-two".