42200138 has 4 divisors (see below), whose sum is σ = 63300210. Its totient is φ = 21100068.

The previous prime is 42200131. The next prime is 42200143. The reversal of 42200138 is 83100224.

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

It can be written as a sum of positive squares in only one way, i.e., 31618129 + 10582009 = 5623^2 + 3253^2 .

It is not an unprimeable number, because it can be changed into a prime (42200131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550033 + ... + 10550036.

Almost surely, 2^42200138 is an apocalyptic number.

42200138 is a deficient number, since it is larger than the sum of its proper divisors (21100072).

42200138 is a wasteful number, since it uses less digits than its factorization.

42200138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21100071.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 42200138 is about 6496.1633292275. The cubic root of 42200138 is about 348.1539207687.

The spelling of 42200138 in words is "forty-two million, two hundred thousand, one hundred thirty-eight".