21557224498 has 8 divisors (see below), whose sum is σ = 32336531100. Its totient is φ = 10778380800.

The previous prime is 21557224453. The next prime is 21557224517. The reversal of 21557224498 is 89442275512.

It can be written as a sum of positive squares in 2 ways, for example, as 21165303289 + 391921209 = 145483^2 + 19797^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45778 + ... + 212626.

Almost surely, 2^21557224498 is an apocalyptic number.

21557224498 is a deficient number, since it is larger than the sum of its proper divisors (10779306602).

21557224498 is a wasteful number, since it uses less digits than its factorization.

21557224498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231452.

The product of its digits is 1612800, while the sum is 49.

The spelling of 21557224498 in words is "twenty-one billion, five hundred fifty-seven million, two hundred twenty-four thousand, four hundred ninety-eight".