22515545 has 8 divisors (see below), whose sum is σ = 29097096. Its totient is φ = 16626816.

The previous prime is 22515541. The next prime is 22515547. The reversal of 22515545 is 54551522.

It can be written as a sum of positive squares in 4 ways, for example, as 85849 + 22429696 = 293^2 + 4736^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22515545 - 2² = 22515541 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22515541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173132 + ... + 173261.

It is an arithmetic number, because the mean of its divisors is an integer number (3637137).

Almost surely, 2^22515545 is an apocalyptic number.

It is an amenable number.

22515545 is a deficient number, since it is larger than the sum of its proper divisors (6581551).

22515545 is a wasteful number, since it uses less digits than its factorization.

22515545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346411.

The product of its digits is 10000, while the sum is 29.

The square root of 22515545 is about 4745.0547942042. The cubic root of 22515545 is about 282.3758088309.

The spelling of 22515545 in words is "twenty-two million, five hundred fifteen thousand, five hundred forty-five".