22144154505251 has 4 divisors (see below), whose sum is σ = 22150408153104. Its totient is φ = 22137900857400.

The previous prime is 22144154505241. The next prime is 22144154505257. The reversal of 22144154505251 is 15250545144122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22144154505251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22144154505199 and 22144154505208.

It is not an unprimeable number, because it can be changed into a prime (22144154505257) 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, 3126818615 + ... + 3126825696.

It is an arithmetic number, because the mean of its divisors is an integer number (5537602038276).

Almost surely, 2^{22144154505251} is an apocalyptic number.

22144154505251 is a deficient number, since it is larger than the sum of its proper divisors (6253647853).

22144154505251 is an equidigital number, since it uses as much as digits as its factorization.

22144154505251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6253647852.

The product of its (nonzero) digits is 320000, while the sum is 41.

Adding to 22144154505251 its reverse (15250545144122), we get a palindrome (37394699649373).

The spelling of 22144154505251 in words is "twenty-two trillion, one hundred forty-four billion, one hundred fifty-four million, five hundred five thousand, two hundred fifty-one".