1231423522 has 8 divisors (see below), whose sum is σ = 2111011776. Its totient is φ = 527752932.

The previous prime is 1231423511. The next prime is 1231423579. The reversal of 1231423522 is 2253241321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43979398 + ... + 43979425.

It is an arithmetic number, because the mean of its divisors is an integer number (263876472).

Almost surely, 2^1231423522 is an apocalyptic number.

1231423522 is a deficient number, since it is larger than the sum of its proper divisors (879588254).

1231423522 is an equidigital number, since it uses as much as digits as its factorization.

1231423522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87958832.

The product of its digits is 2880, while the sum is 25.

The square root of 1231423522 is about 35091.6446180569. The cubic root of 1231423522 is about 1071.8544491488.

Adding to 1231423522 its reverse (2253241321), we get a palindrome (3484664843).

The spelling of 1231423522 in words is "one billion, two hundred thirty-one million, four hundred twenty-three thousand, five hundred twenty-two".