1312220415 has 32 divisors (see below), whose sum is σ = 2319436800. Its totient is φ = 628168320.

The previous prime is 1312220407. The next prime is 1312220419. The reversal of 1312220415 is 5140222131.

1312220415 = 158² + 159² + ... + 1579².

It is not a de Polignac number, because 1312220415 - 2³ = 1312220407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1312220391 and 1312220400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312220419) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37300 + ... + 63369.

It is an arithmetic number, because the mean of its divisors is an integer number (72482400).

Almost surely, 2^1312220415 is an apocalyptic number.

1312220415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1312220415 is a deficient number, since it is larger than the sum of its proper divisors (1007216385).

1312220415 is a wasteful number, since it uses less digits than its factorization.

1312220415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100767.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1312220415 is about 36224.5830203744. The cubic root of 1312220415 is about 1094.8020367300.

Adding to 1312220415 its reverse (5140222131), we get a palindrome (6452442546).

The spelling of 1312220415 in words is "one billion, three hundred twelve million, two hundred twenty thousand, four hundred fifteen".