42217236 has 72 divisors (see below), whose sum is σ = 113166144. Its totient is φ = 13242240.

The previous prime is 42217229. The next prime is 42217237. The reversal of 42217236 is 63271224.

42217236 is a `hidden beast` number, since 422 + 1 + 7 + 236 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42217237) 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, 55096 + ... + 55856.

It is an arithmetic number, because the mean of its divisors is an integer number (1571752).

Almost surely, 2^42217236 is an apocalyptic number.

42217236 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42217236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56583072).

42217236 is an abundant number, since it is smaller than the sum of its proper divisors (70948908).

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

42217236 is a wasteful number, since it uses less digits than its factorization.

42217236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861 (or 856 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 42217236 is about 6497.4792035065. The cubic root of 42217236 is about 348.2009342956.

The spelling of 42217236 in words is "forty-two million, two hundred seventeen thousand, two hundred thirty-six".