231540466 has 32 divisors (see below), whose sum is σ = 370085760. Its totient is φ = 108455424.

The previous prime is 231540401. The next prime is 231540467. The reversal of 231540466 is 664045132.

It is a super-2 number, since 2×231540466² = 107221974790994312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231540467) 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, 655746 + ... + 656098.

It is an arithmetic number, because the mean of its divisors is an integer number (11565180).

Almost surely, 2^231540466 is an apocalyptic number.

231540466 is a deficient number, since it is larger than the sum of its proper divisors (138545294).

231540466 is a wasteful number, since it uses less digits than its factorization.

231540466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 231540466 is about 15216.4537918662. The cubic root of 231540466 is about 614.0573975421.

Adding to 231540466 its reverse (664045132), we get a palindrome (895585598).

The spelling of 231540466 in words is "two hundred thirty-one million, five hundred forty thousand, four hundred sixty-six".