231212473 has 4 divisors (see below), whose sum is σ = 231260560. Its totient is φ = 231164388.

The previous prime is 231212441. The next prime is 231212521. The reversal of 231212473 is 374212132.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231212473 - 2⁵ = 231212441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231218473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15915 + ... + 26752.

It is an arithmetic number, because the mean of its divisors is an integer number (57815140).

Almost surely, 2^231212473 is an apocalyptic number.

It is an amenable number.

231212473 is a deficient number, since it is larger than the sum of its proper divisors (48087).

231212473 is an equidigital number, since it uses as much as digits as its factorization.

231212473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48086.

The product of its digits is 2016, while the sum is 25.

The square root of 231212473 is about 15205.6723955240. The cubic root of 231212473 is about 613.7673090053.

The spelling of 231212473 in words is "two hundred thirty-one million, two hundred twelve thousand, four hundred seventy-three".