15220117 has 16 divisors (see below), whose sum is σ = 17712000. Its totient is φ = 12925440.

The previous prime is 15220111. The next prime is 15220129. The reversal of 15220117 is 71102251.

It is a de Polignac number, because none of the positive numbers 2^k-15220117 is a prime.

It is a super-2 number, since 2×15220117² = 463303922987378, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15220094 and 15220103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15220111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37009 + ... + 37417.

It is an arithmetic number, because the mean of its divisors is an integer number (1107000).

Almost surely, 2^15220117 is an apocalyptic number.

15220117 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

15220117 is a deficient number, since it is larger than the sum of its proper divisors (2491883).

15220117 is a wasteful number, since it uses less digits than its factorization.

15220117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 15220117 is about 3901.2968356689. The cubic root of 15220117 is about 247.8216991470.

Adding to 15220117 its reverse (71102251), we get a palindrome (86322368).

The spelling of 15220117 in words is "fifteen million, two hundred twenty thousand, one hundred seventeen".