13220415 has 72 divisors (see below), whose sum is σ = 26452608. Its totient is φ = 6298560.

The previous prime is 13220411. The next prime is 13220419. The reversal of 13220415 is 51402231.

It is an interprime number because it is at equal distance from previous prime (13220411) and next prime (13220419).

It is not a de Polignac number, because 13220415 - 2² = 13220411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220411) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 426450 + ... + 426480.

Almost surely, 2^13220415 is an apocalyptic number.

13220415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13220415 is an abundant number, since it is smaller than the sum of its proper divisors (13232193).

13220415 is an frugal number, since it uses more digits than its factorization.

13220415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 13220415 is about 3635.9888613691. The cubic root of 13220415 is about 236.4549242373.

Adding to 13220415 its reverse (51402231), we get a palindrome (64622646).

The spelling of 13220415 in words is "thirteen million, two hundred twenty thousand, four hundred fifteen".