22221563737 has 4 divisors (see below), whose sum is σ = 22234462480. Its totient is φ = 22208664996.

The previous prime is 22221563729. The next prime is 22221563773. The reversal of 22221563737 is 73736512222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22221563737 - 2³ = 22221563729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22221563737.

It is not an unprimeable number, because it can be changed into a prime (22221560737) 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, 6446787 + ... + 6450232.

It is an arithmetic number, because the mean of its divisors is an integer number (5558615620).

Almost surely, 2^22221563737 is an apocalyptic number.

It is an amenable number.

22221563737 is a deficient number, since it is larger than the sum of its proper divisors (12898743).

22221563737 is a wasteful number, since it uses less digits than its factorization.

22221563737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12898742.

The product of its digits is 211680, while the sum is 40.

The spelling of 22221563737 in words is "twenty-two billion, two hundred twenty-one million, five hundred sixty-three thousand, seven hundred thirty-seven".