22211154551 has 4 divisors (see below), whose sum is σ = 23517693072. Its totient is φ = 20904616032.

The previous prime is 22211154509. The next prime is 22211154569. The reversal of 22211154551 is 15545111222.

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

It is not a de Polignac number, because 22211154551 - 2¹⁰ = 22211153527 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 (22211150551) 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, 653269235 + ... + 653269268.

It is an arithmetic number, because the mean of its divisors is an integer number (5879423268).

Almost surely, 2^22211154551 is an apocalyptic number.

22211154551 is a deficient number, since it is larger than the sum of its proper divisors (1306538521).

22211154551 is a wasteful number, since it uses less digits than its factorization.

22211154551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306538520.

The product of its digits is 4000, while the sum is 29.

Adding to 22211154551 its reverse (15545111222), we get a palindrome (37756265773).

The spelling of 22211154551 in words is "twenty-two billion, two hundred eleven million, one hundred fifty-four thousand, five hundred fifty-one".