22172461 has 4 divisors (see below), whose sum is σ = 22244992. Its totient is φ = 22099932.

The previous prime is 22172459. The next prime is 22172473. The reversal of 22172461 is 16427122.

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 22172461 - 2¹ = 22172459 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 (22172441) 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, 35805 + ... + 36418.

It is an arithmetic number, because the mean of its divisors is an integer number (5561248).

Almost surely, 2^22172461 is an apocalyptic number.

It is an amenable number.

22172461 is a deficient number, since it is larger than the sum of its proper divisors (72531).

22172461 is an equidigital number, since it uses as much as digits as its factorization.

22172461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72530.

The product of its digits is 1344, while the sum is 25.

The square root of 22172461 is about 4708.7642752637. The cubic root of 22172461 is about 280.9342137339.

Adding to 22172461 its reverse (16427122), we get a palindrome (38599583).

The spelling of 22172461 in words is "twenty-two million, one hundred seventy-two thousand, four hundred sixty-one".