42201555 has 16 divisors (see below), whose sum is σ = 73661184. Its totient is φ = 20461280.

The previous prime is 42201547. The next prime is 42201557. The reversal of 42201555 is 55510224.

It is a happy number.

It is not a de Polignac number, because 42201555 - 2³ = 42201547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42201557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127719 + ... + 128048.

It is an arithmetic number, because the mean of its divisors is an integer number (4603824).

Almost surely, 2^42201555 is an apocalyptic number.

42201555 is a deficient number, since it is larger than the sum of its proper divisors (31459629).

42201555 is a wasteful number, since it uses less digits than its factorization.

42201555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255786.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 42201555 is about 6496.2723926880. The cubic root of 42201555 is about 348.1578175062.

Adding to 42201555 its reverse (55510224), we get a palindrome (97711779).

It can be divided in two parts, 4220 and 1555, that added together give a palindrome (5775).

The spelling of 42201555 in words is "forty-two million, two hundred one thousand, five hundred fifty-five".