22181487 has 8 divisors (see below), whose sum is σ = 29599536. Its totient is φ = 14775552.

The previous prime is 22181483. The next prime is 22181503. The reversal of 22181487 is 78418122.

It is a happy number.

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

It is not a de Polignac number, because 22181487 - 2² = 22181483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22181483) 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, 2913 + ... + 7269.

It is an arithmetic number, because the mean of its divisors is an integer number (3699942).

Almost surely, 2^22181487 is an apocalyptic number.

22181487 is a deficient number, since it is larger than the sum of its proper divisors (7418049).

22181487 is a wasteful number, since it uses less digits than its factorization.

22181487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6057.

The product of its digits is 7168, while the sum is 33.

The square root of 22181487 is about 4709.7226032963. The cubic root of 22181487 is about 280.9723296082.

The spelling of 22181487 in words is "twenty-two million, one hundred eighty-one thousand, four hundred eighty-seven".