231660442 has 8 divisors (see below), whose sum is σ = 374220756. Its totient is φ = 106920192.

The previous prime is 231660421. The next prime is 231660461. The reversal of 231660442 is 244066132.

It can be written as a sum of positive squares in 2 ways, for example, as 186622921 + 45037521 = 13661^2 + 6711^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 231660442.

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, 4454983 + ... + 4455034.

Almost surely, 2^231660442 is an apocalyptic number.

231660442 is a deficient number, since it is larger than the sum of its proper divisors (142560314).

231660442 is a wasteful number, since it uses less digits than its factorization.

231660442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8910032.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 231660442 is about 15220.3955927565. The cubic root of 231660442 is about 614.1634400992.

The spelling of 231660442 in words is "two hundred thirty-one million, six hundred sixty thousand, four hundred forty-two".