231403330 has 16 divisors (see below), whose sum is σ = 416725560. Its totient is φ = 92516992.

The previous prime is 231403301. The next prime is 231403349. The reversal of 231403330 is 33304132.

It can be written as a sum of positive squares in 4 ways, for example, as 230827249 + 576081 = 15193^2 + 759^2 .

It is a super-2 number, since 2×231403330² = 107095002270177800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231403298 and 231403307.

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, 23742 + ... + 32038.

Almost surely, 2^231403330 is an apocalyptic number.

231403330 is a deficient number, since it is larger than the sum of its proper divisors (185322230).

231403330 is a wasteful number, since it uses less digits than its factorization.

231403330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11093.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 231403330 is about 15211.9469496840. The cubic root of 231403330 is about 613.9361429910.

Adding to 231403330 its reverse (33304132), we get a palindrome (264707462).

The spelling of 231403330 in words is "two hundred thirty-one million, four hundred three thousand, three hundred thirty".