231000730 has 32 divisors (see below), whose sum is σ = 443988864. Its totient is φ = 86323776.

The previous prime is 231000719. The next prime is 231000733. The reversal of 231000730 is 37000132.

231000730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231000730² = 106722674521065800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231000733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1789 + ... + 21568.

It is an arithmetic number, because the mean of its divisors is an integer number (13874652).

Almost surely, 2^231000730 is an apocalyptic number.

231000730 is a deficient number, since it is larger than the sum of its proper divisors (212988134).

231000730 is a wasteful number, since it uses less digits than its factorization.

231000730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23430.

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 231000730 is about 15198.7081687886. The cubic root of 231000730 is about 613.5798903044.

Adding to 231000730 its reverse (37000132), we get a palindrome (268000862).

The spelling of 231000730 in words is "two hundred thirty-one million, seven hundred thirty", and thus it is an aban number.