21224143588 has 12 divisors (see below), whose sum is σ = 37525161772. Its totient is φ = 10502668800.

The previous prime is 21224143541. The next prime is 21224143597. The reversal of 21224143588 is 88534142212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17455165924 + 3768977664 = 132118^2 + 61392^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21224143588.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27350313 + ... + 27351088.

Almost surely, 2^21224143588 is an apocalyptic number.

It is an amenable number.

21224143588 is a deficient number, since it is larger than the sum of its proper divisors (16301018184).

21224143588 is a wasteful number, since it uses less digits than its factorization.

21224143588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54701502 (or 54701500 counting only the distinct ones).

The product of its digits is 122880, while the sum is 40.

The spelling of 21224143588 in words is "twenty-one billion, two hundred twenty-four million, one hundred forty-three thousand, five hundred eighty-eight".