22615541 has 4 divisors (see below), whose sum is σ = 24355212. Its totient is φ = 20875872.

The previous prime is 22615519. The next prime is 22615543. The reversal of 22615541 is 14551622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14551622 = 2 ⋅7275811.

It can be written as a sum of positive squares in 2 ways, for example, as 1030225 + 21585316 = 1015^2 + 4646^2 .

It is a cyclic number.

It is not a de Polignac number, because 22615541 - 2²² = 18421237 is a prime.

It is a super-2 number, since 2×22615541² = 1022925389445362, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22615541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22615543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 869816 + ... + 869841.

It is an arithmetic number, because the mean of its divisors is an integer number (6088803).

Almost surely, 2^22615541 is an apocalyptic number.

It is an amenable number.

22615541 is a deficient number, since it is larger than the sum of its proper divisors (1739671).

22615541 is a wasteful number, since it uses less digits than its factorization.

22615541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739670.

The product of its digits is 2400, while the sum is 26.

The square root of 22615541 is about 4755.5799856590. The cubic root of 22615541 is about 282.7932204901.

The spelling of 22615541 in words is "twenty-two million, six hundred fifteen thousand, five hundred forty-one".