22812261 has 4 divisors (see below), whose sum is σ = 30416352. Its totient is φ = 15208172.

The previous prime is 22812259. The next prime is 22812269. The reversal of 22812261 is 16221822.

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 22812261 - 2¹ = 22812259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22812269) 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, 3802041 + ... + 3802046.

It is an arithmetic number, because the mean of its divisors is an integer number (7604088).

Almost surely, 2^22812261 is an apocalyptic number.

It is an amenable number.

22812261 is a deficient number, since it is larger than the sum of its proper divisors (7604091).

22812261 is an equidigital number, since it uses as much as digits as its factorization.

22812261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7604090.

The product of its digits is 768, while the sum is 24.

The square root of 22812261 is about 4776.2182739067. The cubic root of 22812261 is about 283.6108080664.

The spelling of 22812261 in words is "twenty-two million, eight hundred twelve thousand, two hundred sixty-one".