22881487 has 4 divisors (see below), whose sum is σ = 22947400. Its totient is φ = 22815576.

The previous prime is 22881479. The next prime is 22881511. The reversal of 22881487 is 78418822.

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 22881487 - 2³ = 22881479 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 (22881407) 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, 32433 + ... + 33130.

It is an arithmetic number, because the mean of its divisors is an integer number (5736850).

Almost surely, 2^22881487 is an apocalyptic number.

22881487 is a deficient number, since it is larger than the sum of its proper divisors (65913).

22881487 is an equidigital number, since it uses as much as digits as its factorization.

22881487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65912.

The product of its digits is 57344, while the sum is 40.

The square root of 22881487 is about 4783.4597311987. The cubic root of 22881487 is about 283.8973997894.

The spelling of 22881487 in words is "twenty-two million, eight hundred eighty-one thousand, four hundred eighty-seven".