42212550 has 48 divisors (see below), whose sum is σ = 105118272. Its totient is φ = 11210400.

The previous prime is 42212543. The next prime is 42212551. The reversal of 42212550 is 5521224.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42212551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51645 + ... + 52455.

It is an arithmetic number, because the mean of its divisors is an integer number (2189964).

Almost surely, 2^42212550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42212550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52559136).

42212550 is an abundant number, since it is smaller than the sum of its proper divisors (62905722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42212550 is a wasteful number, since it uses less digits than its factorization.

42212550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173 (or 1168 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 42212550 is about 6497.1185921145. The cubic root of 42212550 is about 348.1880506956.

Adding to 42212550 its reverse (5521224), we get a palindrome (47733774).

The spelling of 42212550 in words is "forty-two million, two hundred twelve thousand, five hundred fifty".