15220105 has 4 divisors (see below), whose sum is σ = 18264132. Its totient is φ = 12176080.

The previous prime is 15220097. The next prime is 15220111. The reversal of 15220105 is 50102251.

15220105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50102251 = 617 ⋅81203.

It can be written as a sum of positive squares in 2 ways, for example, as 5659641 + 9560464 = 2379^2 + 3092^2 .

It is not a de Polignac number, because 15220105 - 2³ = 15220097 is a prime.

It is a super-2 number, since 2×15220105² = 463303192422050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1522006 + ... + 1522015.

It is an arithmetic number, because the mean of its divisors is an integer number (4566033).

Almost surely, 2^15220105 is an apocalyptic number.

It is an amenable number.

15220105 is a deficient number, since it is larger than the sum of its proper divisors (3044027).

15220105 is an equidigital number, since it uses as much as digits as its factorization.

15220105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3044026.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 15220105 is about 3901.2952977184. The cubic root of 15220105 is about 247.8216340170.

Adding to 15220105 its reverse (50102251), we get a palindrome (65322356).

The spelling of 15220105 in words is "fifteen million, two hundred twenty thousand, one hundred five".