231455645 has 8 divisors (see below), whose sum is σ = 278125056. Its totient is φ = 184912336.

The previous prime is 231455639. The next prime is 231455657. The reversal of 231455645 is 546554132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231455645 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27437 + ... + 34866.

It is an arithmetic number, because the mean of its divisors is an integer number (34765632).

Almost surely, 2^231455645 is an apocalyptic number.

It is an amenable number.

231455645 is a deficient number, since it is larger than the sum of its proper divisors (46669411).

231455645 is an equidigital number, since it uses as much as digits as its factorization.

231455645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63051.

The product of its digits is 72000, while the sum is 35.

The square root of 231455645 is about 15213.6663891384. Note that the first 3 decimals coincide. The cubic root of 231455645 is about 613.9824051447.

The spelling of 231455645 in words is "two hundred thirty-one million, four hundred fifty-five thousand, six hundred forty-five".