22143515242 has 4 divisors (see below), whose sum is σ = 33215272866. Its totient is φ = 11071757620.

The previous prime is 22143515237. The next prime is 22143515323. The reversal of 22143515242 is 24251534122.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 21974801121 + 168714121 = 148239^2 + 12989^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5535878809 + ... + 5535878812.

Almost surely, 2^22143515242 is an apocalyptic number.

22143515242 is a deficient number, since it is larger than the sum of its proper divisors (11071757624).

22143515242 is a wasteful number, since it uses less digits than its factorization.

22143515242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11071757623.

The product of its digits is 19200, while the sum is 31.

The spelling of 22143515242 in words is "twenty-two billion, one hundred forty-three million, five hundred fifteen thousand, two hundred forty-two".