1311915801 has 8 divisors (see below), whose sum is σ = 1999109824. Its totient is φ = 749666160.

The previous prime is 1311915797. The next prime is 1311915817. The reversal of 1311915801 is 1085191131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1311915801 - 2² = 1311915797 is a prime.

It is a super-2 number, since 2×1311915801² = 3442246137826943202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311915821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31236070 + ... + 31236111.

It is an arithmetic number, because the mean of its divisors is an integer number (249888728).

Almost surely, 2^1311915801 is an apocalyptic number.

It is an amenable number.

1311915801 is a deficient number, since it is larger than the sum of its proper divisors (687194023).

1311915801 is an equidigital number, since it uses as much as digits as its factorization.

1311915801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62472191.

The product of its (nonzero) digits is 1080, while the sum is 30.

The square root of 1311915801 is about 36220.3782558935. The cubic root of 1311915801 is about 1094.7173157404.

It can be divided in two parts, 13119 and 15801, that added together give a triangular number (28920 = T₂₄₀).

The spelling of 1311915801 in words is "one billion, three hundred eleven million, nine hundred fifteen thousand, eight hundred one".