1231518452 has 24 divisors (see below), whose sum is σ = 2227143072. Its totient is φ = 595476000.

The previous prime is 1231518433. The next prime is 1231518461. The reversal of 1231518452 is 2548151321.

It is a congruent number.

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, 18074 + ... + 52817.

It is an arithmetic number, because the mean of its divisors is an integer number (92797628).

Almost surely, 2^1231518452 is an apocalyptic number.

It is an amenable number.

1231518452 is a deficient number, since it is larger than the sum of its proper divisors (995624620).

1231518452 is a wasteful number, since it uses less digits than its factorization.

1231518452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71039 (or 71037 counting only the distinct ones).

The product of its digits is 9600, while the sum is 32.

The square root of 1231518452 is about 35092.9971931723. The cubic root of 1231518452 is about 1071.8819914001.

Adding to 1231518452 its reverse (2548151321), we get a palindrome (3779669773).

The spelling of 1231518452 in words is "one billion, two hundred thirty-one million, five hundred eighteen thousand, four hundred fifty-two".