1311995475 has 60 divisors (see below), whose sum is σ = 2777480464. Its totient is φ = 599762880.

The previous prime is 1311995441. The next prime is 1311995483. The reversal of 1311995475 is 5745991131.

1311995475 is a `hidden beast` number, since 1 + 3 + 11 + 99 + 547 + 5 = 666.

It is not a de Polignac number, because 1311995475 - 2⁶ = 1311995411 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311995475.

It is an unprimeable number.

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 59 ways as a sum of consecutive naturals, for example, 32104 + ... + 60453.

Almost surely, 2^1311995475 is an apocalyptic number.

1311995475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1311995475 is an abundant number, since it is smaller than the sum of its proper divisors (1465484989).

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

1311995475 is an equidigital number, since it uses as much as digits as its factorization.

1311995475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92586 (or 92572 counting only the distinct ones).

The product of its digits is 170100, while the sum is 45.

The square root of 1311995475 is about 36221.4780896639. The cubic root of 1311995475 is about 1094.7394763958.

The spelling of 1311995475 in words is "one billion, three hundred eleven million, nine hundred ninety-five thousand, four hundred seventy-five".