22861487 has 4 divisors (see below), whose sum is σ = 24939816. Its totient is φ = 20783160.

The previous prime is 22861463. The next prime is 22861493. The reversal of 22861487 is 78416822.

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 22861487 - 2¹² = 22857391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22861487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22861417) 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, 1039148 + ... + 1039169.

It is an arithmetic number, because the mean of its divisors is an integer number (6234954).

Almost surely, 2^22861487 is an apocalyptic number.

22861487 is a deficient number, since it is larger than the sum of its proper divisors (2078329).

22861487 is a wasteful number, since it uses less digits than its factorization.

22861487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2078328.

The product of its digits is 43008, while the sum is 38.

The square root of 22861487 is about 4781.3687370877. The cubic root of 22861487 is about 283.8146603663.

It can be divided in two parts, 2286 and 1487, that added together give a palindrome (3773).

The spelling of 22861487 in words is "twenty-two million, eight hundred sixty-one thousand, four hundred eighty-seven".