22151353442 has 4 divisors (see below), whose sum is σ = 33227030166. Its totient is φ = 11075676720.

The previous prime is 22151353409. The next prime is 22151353457. The reversal of 22151353442 is 24435315122.

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., 18427791001 + 3723562441 = 135749^2 + 61021^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22151353399 and 22151353408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5537838359 + ... + 5537838362.

Almost surely, 2^22151353442 is an apocalyptic number.

22151353442 is a deficient number, since it is larger than the sum of its proper divisors (11075676724).

22151353442 is a wasteful number, since it uses less digits than its factorization.

22151353442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11075676723.

The product of its digits is 28800, while the sum is 32.

Adding to 22151353442 its reverse (24435315122), we get a palindrome (46586668564).

The spelling of 22151353442 in words is "twenty-two billion, one hundred fifty-one million, three hundred fifty-three thousand, four hundred forty-two".