22540311251 has 4 divisors (see below), whose sum is σ = 22849082712. Its totient is φ = 22231539792.

The previous prime is 22540311247. The next prime is 22540311281. The reversal of 22540311251 is 15211304522.

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 22540311251 - 2² = 22540311247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22540311251.

It is not an unprimeable number, because it can be changed into a prime (22540311281) 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, 154385621 + ... + 154385766.

It is an arithmetic number, because the mean of its divisors is an integer number (5712270678).

Almost surely, 2^22540311251 is an apocalyptic number.

22540311251 is a deficient number, since it is larger than the sum of its proper divisors (308771461).

22540311251 is an equidigital number, since it uses as much as digits as its factorization.

22540311251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308771460.

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

Adding to 22540311251 its reverse (15211304522), we get a palindrome (37751615773).

The spelling of 22540311251 in words is "twenty-two billion, five hundred forty million, three hundred eleven thousand, two hundred fifty-one".