15220101 has 16 divisors (see below), whose sum is σ = 22561280. Its totient is φ = 9063360.

The previous prime is 15220097. The next prime is 15220111. The reversal of 15220101 is 10102251.

15220101 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15220101 - 2² = 15220097 is a prime.

It is a Duffinian number.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5086 + ... + 7503.

It is an arithmetic number, because the mean of its divisors is an integer number (1410080).

Almost surely, 2^15220101 is an apocalyptic number.

It is an amenable number.

15220101 is a deficient number, since it is larger than the sum of its proper divisors (7341179).

15220101 is a wasteful number, since it uses less digits than its factorization.

15220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12636.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 15220101 is about 3901.2947850682. The cubic root of 15220101 is about 247.8216123070.

Adding to 15220101 its reverse (10102251), we get a palindrome (25322352).

It can be divided in two parts, 15 and 220101, that added together give a triangular number (220116 = T₆₆₃).

The spelling of 15220101 in words is "fifteen million, two hundred twenty thousand, one hundred one".