22791551 has 8 divisors (see below), whose sum is σ = 24071040. Its totient is φ = 21536152.

The previous prime is 22791529. The next prime is 22791557. The reversal of 22791551 is 15519722.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22791551 - 2¹⁸ = 22529407 is a prime.

It is a super-4 number, since 4×22791551⁴ (a number of 31 digits) contains 4444 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 (22791557) 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 7 ways as a sum of consecutive naturals, for example, 4061 + ... + 7878.

It is an arithmetic number, because the mean of its divisors is an integer number (3008880).

Almost surely, 2^22791551 is an apocalyptic number.

22791551 is a deficient number, since it is larger than the sum of its proper divisors (1279489).

22791551 is a wasteful number, since it uses less digits than its factorization.

22791551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12045.

The product of its digits is 6300, while the sum is 32.

The square root of 22791551 is about 4774.0497483793. The cubic root of 22791551 is about 283.5249571846.

The spelling of 22791551 in words is "twenty-two million, seven hundred ninety-one thousand, five hundred fifty-one".