22151054231 has 2 divisors, whose sum is σ = 22151054232. Its totient is φ = 22151054230.

The previous prime is 22151054203. The next prime is 22151054243. The reversal of 22151054231 is 13245015122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22151054231 is a prime.

It is a super-2 number, since 2×22151054231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22151054231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22151054531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11075527115 + 11075527116.

It is an arithmetic number, because the mean of its divisors is an integer number (11075527116).

Almost surely, 2^22151054231 is an apocalyptic number.

22151054231 is a deficient number, since it is larger than the sum of its proper divisors (1).

22151054231 is an equidigital number, since it uses as much as digits as its factorization.

22151054231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 22151054231 its reverse (13245015122), we get a palindrome (35396069353).

The spelling of 22151054231 in words is "twenty-two billion, one hundred fifty-one million, fifty-four thousand, two hundred thirty-one".