42214221 has 48 divisors (see below), whose sum is σ = 72219264. Its totient is φ = 23265792.

The previous prime is 42214217. The next prime is 42214243. The reversal of 42214221 is 12241224.

It is not a de Polignac number, because 42214221 - 2² = 42214217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42214194 and 42214203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42214021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 308065 + ... + 308201.

It is an arithmetic number, because the mean of its divisors is an integer number (1504568).

Almost surely, 2^42214221 is an apocalyptic number.

It is an amenable number.

42214221 is a deficient number, since it is larger than the sum of its proper divisors (30005043).

42214221 is a wasteful number, since it uses less digits than its factorization.

42214221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 287 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 42214221 is about 6497.2471863090. The cubic root of 42214221 is about 348.1926450208.

Adding to 42214221 its reverse (12241224), we get a palindrome (54455445).

The spelling of 42214221 in words is "forty-two million, two hundred fourteen thousand, two hundred twenty-one".