22350551521 has 4 divisors (see below), whose sum is σ = 22351772592. Its totient is φ = 22349330452.

The previous prime is 22350551497. The next prime is 22350551533. The reversal of 22350551521 is 12515505322.

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 a de Polignac number, because none of the positive numbers 2^k-22350551521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22350551551) 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, 582655 + ... + 619828.

It is an arithmetic number, because the mean of its divisors is an integer number (5587943148).

Almost surely, 2^22350551521 is an apocalyptic number.

It is an amenable number.

22350551521 is a deficient number, since it is larger than the sum of its proper divisors (1221071).

22350551521 is a wasteful number, since it uses less digits than its factorization.

22350551521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221070.

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 22350551521 in words is "twenty-two billion, three hundred fifty million, five hundred fifty-one thousand, five hundred twenty-one".