42215164 has 12 divisors (see below), whose sum is σ = 75594904. Its totient is φ = 20616624.

The previous prime is 42215161. The next prime is 42215171. The reversal of 42215164 is 46151224.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42215161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122547 + ... + 122890.

Almost surely, 2^42215164 is an apocalyptic number.

It is an amenable number.

42215164 is a deficient number, since it is larger than the sum of its proper divisors (33379740).

42215164 is a wasteful number, since it uses less digits than its factorization.

42215164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245484 (or 245482 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 42215164 is about 6497.3197550990. The cubic root of 42215164 is about 348.1952376955.

Adding to 42215164 its reverse (46151224), we get a palindrome (88366388).

The spelling of 42215164 in words is "forty-two million, two hundred fifteen thousand, one hundred sixty-four".