22047871 has 8 divisors (see below), whose sum is σ = 22538880. Its totient is φ = 21562392.

The previous prime is 22047853. The next prime is 22047877. The reversal of 22047871 is 17874022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22047871 is a prime.

It is a super-2 number, since 2×22047871² = 972217231265282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22047877) 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, 7260 + ... + 9838.

It is an arithmetic number, because the mean of its divisors is an integer number (2817360).

Almost surely, 2^22047871 is an apocalyptic number.

22047871 is a deficient number, since it is larger than the sum of its proper divisors (491009).

22047871 is a wasteful number, since it uses less digits than its factorization.

22047871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2765.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 22047871 is about 4695.5160525761. The cubic root of 22047871 is about 280.4070228393.

Subtracting from 22047871 its reverse (17874022), we obtain a square (4173849 = 2043²).

The spelling of 22047871 in words is "twenty-two million, forty-seven thousand, eight hundred seventy-one".