22191974 has 16 divisors (see below), whose sum is σ = 38216448. Its totient is φ = 9467592.

The previous prime is 22191937. The next prime is 22191977. The reversal of 22191974 is 47919122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22191977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314 + ... + 6669.

It is an arithmetic number, because the mean of its divisors is an integer number (2388528).

Almost surely, 2^22191974 is an apocalyptic number.

22191974 is a deficient number, since it is larger than the sum of its proper divisors (16024474).

22191974 is a wasteful number, since it uses less digits than its factorization.

22191974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7219.

The product of its digits is 9072, while the sum is 35.

The square root of 22191974 is about 4710.8358069455. The cubic root of 22191974 is about 281.0166021523.

It can be divided in two parts, 2219197 and 4, that multiplied together give a palindrome (8876788).

The spelling of 22191974 in words is "twenty-two million, one hundred ninety-one thousand, nine hundred seventy-four".