22551003421 has 4 divisors (see below), whose sum is σ = 23877533052. Its totient is φ = 21224473792.

The previous prime is 22551003383. The next prime is 22551003437. The reversal of 22551003421 is 12430015522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13668883396 + 8882120025 = 116914^2 + 94245^2 .

It is a cyclic number.

It is not a de Polignac number, because 22551003421 - 2¹⁵ = 22550970653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22551003451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663264790 + ... + 663264823.

It is an arithmetic number, because the mean of its divisors is an integer number (5969383263).

Almost surely, 2^22551003421 is an apocalyptic number.

It is an amenable number.

22551003421 is a deficient number, since it is larger than the sum of its proper divisors (1326529631).

22551003421 is a wasteful number, since it uses less digits than its factorization.

22551003421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326529630.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 22551003421 its reverse (12430015522), we get a palindrome (34981018943).

The spelling of 22551003421 in words is "twenty-two billion, five hundred fifty-one million, three thousand, four hundred twenty-one".