1311102431 has 8 divisors (see below), whose sum is σ = 1333787904. Its totient is φ = 1288508760.

The previous prime is 1311102427. The next prime is 1311102433. The reversal of 1311102431 is 1342011131.

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

It is a cyclic number.

It is not a de Polignac number, because 1311102431 - 2² = 1311102427 is a prime.

It is a super-2 number, since 2×1311102431² = 3437979169148219522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311102433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6176 + ... + 51578.

It is an arithmetic number, because the mean of its divisors is an integer number (166723488).

Almost surely, 2^1311102431 is an apocalyptic number.

1311102431 is a deficient number, since it is larger than the sum of its proper divisors (22685473).

1311102431 is an equidigital number, since it uses as much as digits as its factorization.

1311102431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45901.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1311102431 is about 36209.1484434528. The cubic root of 1311102431 is about 1094.4910323413.

Adding to 1311102431 its reverse (1342011131), we get a palindrome (2653113562).

The spelling of 1311102431 in words is "one billion, three hundred eleven million, one hundred two thousand, four hundred thirty-one".