22791261 has 4 divisors (see below), whose sum is σ = 30388352. Its totient is φ = 15194172.

The previous prime is 22791239. The next prime is 22791277. The reversal of 22791261 is 16219722.

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 not a de Polignac number, because 22791261 - 2⁷ = 22791133 is a prime.

It is a super-3 number, since 3×22791261³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22791211) 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, 3798541 + ... + 3798546.

It is an arithmetic number, because the mean of its divisors is an integer number (7597088).

Almost surely, 2^22791261 is an apocalyptic number.

It is an amenable number.

22791261 is a deficient number, since it is larger than the sum of its proper divisors (7597091).

22791261 is an equidigital number, since it uses as much as digits as its factorization.

22791261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7597090.

The product of its digits is 3024, while the sum is 30.

The square root of 22791261 is about 4774.0193757462. The cubic root of 22791261 is about 283.5237546544.

The spelling of 22791261 in words is "twenty-two million, seven hundred ninety-one thousand, two hundred sixty-one".