1311651488 has 24 divisors (see below), whose sum is σ = 2951216352. Its totient is φ = 562136256.

The previous prime is 1311651487. The next prime is 1311651493. The reversal of 1311651488 is 8841561131.

It is a super-2 number, since 2×1311651488² = 3440859251945228288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1311651487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2927570 + ... + 2928017.

It is an arithmetic number, because the mean of its divisors is an integer number (122967348).

Almost surely, 2^1311651488 is an apocalyptic number.

It is an amenable number.

1311651488 is an abundant number, since it is smaller than the sum of its proper divisors (1639564864).

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

1311651488 is an equidigital number, since it uses as much as digits as its factorization.

1311651488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5855604 (or 5855596 counting only the distinct ones).

The product of its digits is 23040, while the sum is 38.

The square root of 1311651488 is about 36216.7293940245. The cubic root of 1311651488 is about 1094.6437928686.

The spelling of 1311651488 in words is "one billion, three hundred eleven million, six hundred fifty-one thousand, four hundred eighty-eight".