22239487 has 4 divisors (see below), whose sum is σ = 22249080. Its totient is φ = 22229896.

The previous prime is 22239473. The next prime is 22239509. The reversal of 22239487 is 78493222.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22239487 - 2¹⁵ = 22206719 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 (22239407) 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, 1089 + ... + 6757.

It is an arithmetic number, because the mean of its divisors is an integer number (5562270).

Almost surely, 2^22239487 is an apocalyptic number.

22239487 is a deficient number, since it is larger than the sum of its proper divisors (9593).

22239487 is an equidigital number, since it uses as much as digits as its factorization.

22239487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9592.

The product of its digits is 48384, while the sum is 37.

The square root of 22239487 is about 4715.8760585919. The cubic root of 22239487 is about 281.2170113078.

The spelling of 22239487 in words is "twenty-two million, two hundred thirty-nine thousand, four hundred eighty-seven".