12022551 has 18 divisors (see below), whose sum is σ = 17704440. Its totient is φ = 7861680.

The previous prime is 12022531. The next prime is 12022561. The reversal of 12022551 is 15522021.

It is not a de Polignac number, because 12022551 - 2⁶ = 12022487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12022511) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 33310 + ... + 33668.

It is an arithmetic number, because the mean of its divisors is an integer number (983580).

Almost surely, 2^12022551 is an apocalyptic number.

12022551 is a deficient number, since it is larger than the sum of its proper divisors (5681889).

12022551 is an equidigital number, since it uses as much as digits as its factorization.

12022551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487 (or 423 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 12022551 is about 3467.3550438338. The cubic root of 12022551 is about 229.0861723837.

Adding to 12022551 its reverse (15522021), we get a palindrome (27544572).

The spelling of 12022551 in words is "twelve million, twenty-two thousand, five hundred fifty-one".