22042151555 has 4 divisors (see below), whose sum is σ = 26450581872. Its totient is φ = 17633721240.

The previous prime is 22042151507. The next prime is 22042151581. The reversal of 22042151555 is 55515124022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55515124022 = 2 ⋅27757562011.

It is not a de Polignac number, because 22042151555 - 2¹⁰ = 22042150531 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2204215151 + ... + 2204215160.

It is an arithmetic number, because the mean of its divisors is an integer number (6612645468).

Almost surely, 2^22042151555 is an apocalyptic number.

22042151555 is a deficient number, since it is larger than the sum of its proper divisors (4408430317).

22042151555 is an equidigital number, since it uses as much as digits as its factorization.

22042151555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4408430316.

The product of its (nonzero) digits is 20000, while the sum is 32.

Adding to 22042151555 its reverse (55515124022), we get a palindrome (77557275577).

The spelling of 22042151555 in words is "twenty-two billion, forty-two million, one hundred fifty-one thousand, five hundred fifty-five".