22447487 has 4 divisors (see below), whose sum is σ = 22462440. Its totient is φ = 22432536.

The previous prime is 22447483. The next prime is 22447501. The reversal of 22447487 is 78474422.

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 22447487 - 2² = 22447483 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22447487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22447483) 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, 4937 + ... + 8322.

It is an arithmetic number, because the mean of its divisors is an integer number (5615610).

Almost surely, 2^22447487 is an apocalyptic number.

22447487 is a deficient number, since it is larger than the sum of its proper divisors (14953).

22447487 is a wasteful number, since it uses less digits than its factorization.

22447487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14952.

The product of its digits is 100352, while the sum is 38.

The square root of 22447487 is about 4737.8779004951. The cubic root of 22447487 is about 282.0910081328.

The spelling of 22447487 in words is "twenty-two million, four hundred forty-seven thousand, four hundred eighty-seven".