1313551332 has 18 divisors (see below), whose sum is σ = 3320365958. Its totient is φ = 437850432.

The previous prime is 1313551331. The next prime is 1313551381. The reversal of 1313551332 is 2331553131.

1313551332 is a `hidden beast` number, since 13 + 135 + 513 + 3 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1299890916 + 13660416 = 36054^2 + 3696^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 1313551296 and 1313551305.

It is not an unprimeable number, because it can be changed into a prime (1313551331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18243733 + ... + 18243804.

Almost surely, 2^1313551332 is an apocalyptic number.

1313551332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1313551332 is an abundant number, since it is smaller than the sum of its proper divisors (2006814626).

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

1313551332 is a wasteful number, since it uses less digits than its factorization.

1313551332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36487547 (or 36487542 counting only the distinct ones).

The product of its digits is 4050, while the sum is 27.

The square root of 1313551332 is about 36242.9487210961. The cubic root of 1313551332 is about 1095.1720452758.

The spelling of 1313551332 in words is "one billion, three hundred thirteen million, five hundred fifty-one thousand, three hundred thirty-two".