22051197 has 20 divisors (see below), whose sum is σ = 37647456. Its totient is φ = 12600360.

The previous prime is 22051177. The next prime is 22051207. The reversal of 22051197 is 79115022.

It is not a de Polignac number, because 22051197 - 2⁷ = 22051069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 22051197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22051147) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18879 + ... + 20012.

Almost surely, 2^22051197 is an apocalyptic number.

22051197 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

22051197 is a deficient number, since it is larger than the sum of its proper divisors (15596259).

22051197 is an equidigital number, since it uses as much as digits as its factorization.

22051197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38910 (or 38901 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 22051197 is about 4695.8702068946. The cubic root of 22051197 is about 280.4211222636.

The spelling of 22051197 in words is "twenty-two million, fifty-one thousand, one hundred ninety-seven".