1311503380 has 24 divisors (see below), whose sum is σ = 3004535520. Its totient is φ = 476910240.

The previous prime is 1311503353. The next prime is 1311503423. The reversal of 1311503380 is 833051131.

It is a super-2 number, since 2×1311503380² = 3440082231502848800, which contains 22 as substring.

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, 2980470 + ... + 2980909.

It is an arithmetic number, because the mean of its divisors is an integer number (125188980).

Almost surely, 2^1311503380 is an apocalyptic number.

1311503380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311503380 is an abundant number, since it is smaller than the sum of its proper divisors (1693032140).

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

1311503380 is a wasteful number, since it uses less digits than its factorization.

1311503380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5961399 (or 5961397 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1311503380 is about 36214.6845906464. The cubic root of 1311503380 is about 1094.6025899508.

The spelling of 1311503380 in words is "one billion, three hundred eleven million, five hundred three thousand, three hundred eighty".