22151554142 has 4 divisors (see below), whose sum is σ = 33227331216. Its totient is φ = 11075777070.

The previous prime is 22151554141. The next prime is 22151554147. The reversal of 22151554142 is 24145515122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24145515122 = 2 ⋅12072757561.

It is a junction number, because it is equal to n+sod(n) for n = 22151554099 and 22151554108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22151554141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5537888534 + ... + 5537888537.

It is an arithmetic number, because the mean of its divisors is an integer number (8306832804).

Almost surely, 2^22151554142 is an apocalyptic number.

22151554142 is a deficient number, since it is larger than the sum of its proper divisors (11075777074).

22151554142 is a wasteful number, since it uses less digits than its factorization.

22151554142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11075777073.

The product of its digits is 16000, while the sum is 32.

The spelling of 22151554142 in words is "twenty-two billion, one hundred fifty-one million, five hundred fifty-four thousand, one hundred forty-two".