22145143451 has 4 divisors (see below), whose sum is σ = 22162875000. Its totient is φ = 22127411904.

The previous prime is 22145143403. The next prime is 22145143487. The reversal of 22145143451 is 15434154122.

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 22145143451 - 2⁶ = 22145143387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22145143151) 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, 8863901 + ... + 8866398.

It is an arithmetic number, because the mean of its divisors is an integer number (5540718750).

Almost surely, 2^22145143451 is an apocalyptic number.

22145143451 is a deficient number, since it is larger than the sum of its proper divisors (17731549).

22145143451 is a wasteful number, since it uses less digits than its factorization.

22145143451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17731548.

The product of its digits is 19200, while the sum is 32.

Adding to 22145143451 its reverse (15434154122), we get a palindrome (37579297573).

The spelling of 22145143451 in words is "twenty-two billion, one hundred forty-five million, one hundred forty-three thousand, four hundred fifty-one".