231280705 has 8 divisors (see below), whose sum is σ = 278338752. Its totient is φ = 184489968.

The previous prime is 231280691. The next prime is 231280723. The reversal of 231280705 is 507082132.

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-231280705 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64917 + ... + 68386.

It is an arithmetic number, because the mean of its divisors is an integer number (34792344).

Almost surely, 2^231280705 is an apocalyptic number.

It is an amenable number.

231280705 is a deficient number, since it is larger than the sum of its proper divisors (47058047).

231280705 is a wasteful number, since it uses less digits than its factorization.

231280705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133655.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 231280705 is about 15207.9158664164. The cubic root of 231280705 is about 613.8276783727.

The spelling of 231280705 in words is "two hundred thirty-one million, two hundred eighty thousand, seven hundred five".