22251871 has 4 divisors (see below), whose sum is σ = 22293544. Its totient is φ = 22210200.

The previous prime is 22251863. The next prime is 22251877. The reversal of 22251871 is 17815222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22251871 - 2³ = 22251863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22251877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20025 + ... + 21106.

It is an arithmetic number, because the mean of its divisors is an integer number (5573386).

Almost surely, 2^22251871 is an apocalyptic number.

22251871 is a deficient number, since it is larger than the sum of its proper divisors (41673).

22251871 is an equidigital number, since it uses as much as digits as its factorization.

22251871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41672.

The product of its digits is 2240, while the sum is 28.

The square root of 22251871 is about 4717.1888874625. The cubic root of 22251871 is about 281.2691999403.

It can be divided in two parts, 2225 and 1871, that added together give a 12-th power (4096 = 2¹²).

The spelling of 22251871 in words is "twenty-two million, two hundred fifty-one thousand, eight hundred seventy-one".