42555215 has 4 divisors (see below), whose sum is σ = 51066264. Its totient is φ = 34044168.

The previous prime is 42555211. The next prime is 42555229. The reversal of 42555215 is 51255524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42555215 - 2² = 42555211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42555211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4255517 + ... + 4255526.

It is an arithmetic number, because the mean of its divisors is an integer number (12766566).

Almost surely, 2^42555215 is an apocalyptic number.

42555215 is a deficient number, since it is larger than the sum of its proper divisors (8511049).

42555215 is an equidigital number, since it uses as much as digits as its factorization.

42555215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8511048.

The product of its digits is 10000, while the sum is 29.

The square root of 42555215 is about 6523.4358278441. The cubic root of 42555215 is about 349.1276643424.

The spelling of 42555215 in words is "forty-two million, five hundred fifty-five thousand, two hundred fifteen".