22187220537 has 8 divisors (see below), whose sum is σ = 29583671040. Its totient is φ = 14791125200.

The previous prime is 22187220511. The next prime is 22187220553. The reversal of 22187220537 is 73502278122.

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

It is a cyclic number.

It is not a de Polignac number, because 22187220537 - 2¹¹ = 22187218489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22187220495 and 22187220504.

It is not an unprimeable number, because it can be changed into a prime (22187220577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144664 + ... + 255542.

It is an arithmetic number, because the mean of its divisors is an integer number (3697958880).

Almost surely, 2^22187220537 is an apocalyptic number.

It is an amenable number.

22187220537 is a deficient number, since it is larger than the sum of its proper divisors (7396450503).

22187220537 is a wasteful number, since it uses less digits than its factorization.

22187220537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177583.

The product of its (nonzero) digits is 94080, while the sum is 39.

Adding to 22187220537 its reverse (73502278122), we get a palindrome (95689498659).

The spelling of 22187220537 in words is "twenty-two billion, one hundred eighty-seven million, two hundred twenty thousand, five hundred thirty-seven".