22147887 has 16 divisors (see below), whose sum is σ = 30205440. Its totient is φ = 14431872.

The previous prime is 22147883. The next prime is 22147897. The reversal of 22147887 is 78874122.

It is not a de Polignac number, because 22147887 - 2² = 22147883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22147883) 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, 26368 + ... + 27194.

It is an arithmetic number, because the mean of its divisors is an integer number (1887840).

Almost surely, 2^22147887 is an apocalyptic number.

22147887 is a deficient number, since it is larger than the sum of its proper divisors (8057553).

22147887 is a wasteful number, since it uses less digits than its factorization.

22147887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022.

The product of its digits is 50176, while the sum is 39.

The square root of 22147887 is about 4706.1541623708. The cubic root of 22147887 is about 280.8303877999.

It can be divided in two parts, 2214 and 7887, that added together give a palindrome (10101).

The spelling of 22147887 in words is "twenty-two million, one hundred forty-seven thousand, eight hundred eighty-seven".