1312162215 has 128 divisors (see below), whose sum is σ = 2676989952. Its totient is φ = 534159360.

The previous prime is 1312162207. The next prime is 1312162261. The reversal of 1312162215 is 5122612131.

It is a happy number.

It is not a de Polignac number, because 1312162215 - 2³ = 1312162207 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7249425 + ... + 7249605.

It is an arithmetic number, because the mean of its divisors is an integer number (20913984).

Almost surely, 2^1312162215 is an apocalyptic number.

1312162215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1312162215 is an abundant number, since it is smaller than the sum of its proper divisors (1364827737).

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

1312162215 is a wasteful number, since it uses less digits than its factorization.

1312162215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369.

The product of its digits is 720, while the sum is 24.

The square root of 1312162215 is about 36223.7796895906. The cubic root of 1312162215 is about 1094.7858508261.

Adding to 1312162215 its reverse (5122612131), we get a palindrome (6434774346).

The spelling of 1312162215 in words is "one billion, three hundred twelve million, one hundred sixty-two thousand, two hundred fifteen".