21225030057 has 96 divisors (see below), whose sum is σ = 39469098240. Its totient is φ = 10669916160.

The previous prime is 21225030049. The next prime is 21225030083. The reversal of 21225030057 is 75003052212.

It is not a de Polignac number, because 21225030057 - 2³ = 21225030049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21225030057.

It is not an unprimeable number, because it can be changed into a prime (21225030037) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4946569 + ... + 4950857.

It is an arithmetic number, because the mean of its divisors is an integer number (411136440).

Almost surely, 2^21225030057 is an apocalyptic number.

It is an amenable number.

21225030057 is a deficient number, since it is larger than the sum of its proper divisors (18244068183).

21225030057 is a wasteful number, since it uses less digits than its factorization.

21225030057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4543 (or 4540 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

Adding to 21225030057 its reverse (75003052212), we get a palindrome (96228082269).

The spelling of 21225030057 in words is "twenty-one billion, two hundred twenty-five million, thirty thousand, fifty-seven".