42221155 has 16 divisors (see below), whose sum is σ = 51926400. Its totient is φ = 32947200.

The previous prime is 42221147. The next prime is 42221197. The reversal of 42221155 is 55112224.

It is not a de Polignac number, because 42221155 - 2³ = 42221147 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34555 + ... + 35755.

It is an arithmetic number, because the mean of its divisors is an integer number (3245400).

Almost surely, 2^42221155 is an apocalyptic number.

42221155 is a deficient number, since it is larger than the sum of its proper divisors (9705245).

42221155 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (42221154) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (1374).

42221155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374.

The product of its digits is 800, while the sum is 22.

The square root of 42221155 is about 6497.7807750031. The cubic root of 42221155 is about 348.2117083883.

Adding to 42221155 its reverse (55112224), we get a palindrome (97333379).

The spelling of 42221155 in words is "forty-two million, two hundred twenty-one thousand, one hundred fifty-five".