1231513332 has 48 divisors (see below), whose sum is σ = 3333066240. Its totient is φ = 346607712.

The previous prime is 1231513331. The next prime is 1231513369. The reversal of 1231513332 is 2333151321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231513331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103782 + ... + 115037.

It is an arithmetic number, because the mean of its divisors is an integer number (69438880).

Almost surely, 2^1231513332 is an apocalyptic number.

1231513332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231513332 is an abundant number, since it is smaller than the sum of its proper divisors (2101552908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231513332 is a wasteful number, since it uses less digits than its factorization.

1231513332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218900 (or 218898 counting only the distinct ones).

The product of its digits is 1620, while the sum is 24.

The square root of 1231513332 is about 35092.9242440695. The cubic root of 1231513332 is about 1071.8805059593.

Adding to 1231513332 its reverse (2333151321), we get a palindrome (3564664653).

The spelling of 1231513332 in words is "one billion, two hundred thirty-one million, five hundred thirteen thousand, three hundred thirty-two".