15220065 has 32 divisors (see below), whose sum is σ = 28486656. Its totient is φ = 6793920.

The previous prime is 15220031. The next prime is 15220067. The reversal of 15220065 is 56002251.

15220065 is digitally balanced in base 2, base 4 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15220065 - 2⁷ = 15219937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

15220065 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (15220067) 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, 2830 + ... + 6200.

It is an arithmetic number, because the mean of its divisors is an integer number (890208).

Almost surely, 2^15220065 is an apocalyptic number.

15220065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15220065 is a deficient number, since it is larger than the sum of its proper divisors (13266591).

15220065 is a wasteful number, since it uses less digits than its factorization.

15220065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3429.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 15220065 is about 3901.2901712126. The cubic root of 15220065 is about 247.8214169166.

The spelling of 15220065 in words is "fifteen million, two hundred twenty thousand, sixty-five".