42200221 has 12 divisors (see below), whose sum is σ = 49196700. Its totient is φ = 36093120.

The previous prime is 42200203. The next prime is 42200237. The reversal of 42200221 is 12200224.

It can be written as a sum of positive squares in 2 ways, for example, as 26112100 + 16088121 = 5110^2 + 4011^2 .

It is not a de Polignac number, because 42200221 - 2⁹ = 42199709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42200201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39705 + ... + 40753.

It is an arithmetic number, because the mean of its divisors is an integer number (4099725).

Almost surely, 2^42200221 is an apocalyptic number.

It is an amenable number.

42200221 is a deficient number, since it is larger than the sum of its proper divisors (6996479).

42200221 is a wasteful number, since it uses less digits than its factorization.

42200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884 (or 1877 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 42200221 is about 6496.1697176105. The cubic root of 42200221 is about 348.1541490204.

Adding to 42200221 its reverse (12200224), we get a palindrome (54400445).

The spelling of 42200221 in words is "forty-two million, two hundred thousand, two hundred twenty-one".