22150191 has 16 divisors (see below), whose sum is σ = 33984000. Its totient is φ = 12570528.

The previous prime is 22150187. The next prime is 22150211. The reversal of 22150191 is 19105122.

It is not a de Polignac number, because 22150191 - 2² = 22150187 is a prime.

It is a super-2 number, since 2×22150191² = 981261922672962, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22150091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 411 + ... + 6668.

It is an arithmetic number, because the mean of its divisors is an integer number (2124000).

Almost surely, 2^22150191 is an apocalyptic number.

22150191 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22150191 is a deficient number, since it is larger than the sum of its proper divisors (11833809).

22150191 is a wasteful number, since it uses less digits than its factorization.

22150191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7238.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 22150191 is about 4706.3989418663. The cubic root of 22150191 is about 280.8401255351.

The spelling of 22150191 in words is "twenty-two million, one hundred fifty thousand, one hundred ninety-one".