22251111451 has 4 divisors (see below), whose sum is σ = 23422222600. Its totient is φ = 21080000304.

The previous prime is 22251111439. The next prime is 22251111457. The reversal of 22251111451 is 15411115222.

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

It is a cyclic number.

It is not a de Polignac number, because 22251111451 - 2⁹ = 22251110939 is a prime.

It is a super-2 number, since 2×22251111451² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22251111457) 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, 585555546 + ... + 585555583.

It is an arithmetic number, because the mean of its divisors is an integer number (5855555650).

Almost surely, 2^22251111451 is an apocalyptic number.

22251111451 is a deficient number, since it is larger than the sum of its proper divisors (1171111149).

22251111451 is a wasteful number, since it uses less digits than its factorization.

22251111451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171111148.

The product of its digits is 800, while the sum is 25.

Adding to 22251111451 its reverse (15411115222), we get a palindrome (37662226673).

The spelling of 22251111451 in words is "twenty-two billion, two hundred fifty-one million, one hundred eleven thousand, four hundred fifty-one".