22506461 has 4 divisors (see below), whose sum is σ = 22523424. Its totient is φ = 22489500.

The previous prime is 22506437. The next prime is 22506479. The reversal of 22506461 is 16460522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22506461 - 2¹⁴ = 22490077 is a prime.

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 22506461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22506401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6305 + ... + 9206.

It is an arithmetic number, because the mean of its divisors is an integer number (5630856).

Almost surely, 2^22506461 is an apocalyptic number.

It is an amenable number.

22506461 is a deficient number, since it is larger than the sum of its proper divisors (16963).

22506461 is a wasteful number, since it uses less digits than its factorization.

22506461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16962.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 22506461 is about 4744.0974905666. The cubic root of 22506461 is about 282.3378284505.

Adding to 22506461 its reverse (16460522), we get a palindrome (38966983).

The spelling of 22506461 in words is "twenty-two million, five hundred six thousand, four hundred sixty-one".