231742730 has 16 divisors (see below), whose sum is σ = 417354984. Its totient is φ = 92648640.

The previous prime is 231742703. The next prime is 231742751. The reversal of 231742730 is 37247132.

It can be written as a sum of positive squares in 4 ways, for example, as 150724729 + 81018001 = 12277^2 + 9001^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231742693 and 231742702.

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, 18944 + ... + 28676.

Almost surely, 2^231742730 is an apocalyptic number.

231742730 is a deficient number, since it is larger than the sum of its proper divisors (185612254).

231742730 is a wasteful number, since it uses less digits than its factorization.

231742730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12121.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 231742730 is about 15223.0985676373. The cubic root of 231742730 is about 614.2361503959.

Adding to 231742730 its reverse (37247132), we get a palindrome (268989862).

The spelling of 231742730 in words is "two hundred thirty-one million, seven hundred forty-two thousand, seven hundred thirty".