1311557070 has 16 divisors (see below), whose sum is σ = 3147737040. Its totient is φ = 349748544.

The previous prime is 1311557059. The next prime is 1311557087. The reversal of 1311557070 is 707551131.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 43718569 = 1311557070 / (1 + 3 + 1 + 1 + 5 + 5 + 7 + 0 + 7 + 0).

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, 21859255 + ... + 21859314.

It is an arithmetic number, because the mean of its divisors is an integer number (196733565).

Almost surely, 2^1311557070 is an apocalyptic number.

1311557070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311557070 is an abundant number, since it is smaller than the sum of its proper divisors (1836179970).

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

1311557070 is a wasteful number, since it uses less digits than its factorization.

1311557070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43718579.

The product of its (nonzero) digits is 3675, while the sum is 30.

The square root of 1311557070 is about 36215.4258569467. The cubic root of 1311557070 is about 1094.6175266034.

The spelling of 1311557070 in words is "one billion, three hundred eleven million, five hundred fifty-seven thousand, seventy".