42315664 has 10 divisors (see below), whose sum is σ = 81986630. Its totient is φ = 21157824.

The previous prime is 42315661. The next prime is 42315683. The reversal of 42315664 is 46651324.

It can be written as a sum of positive squares in only one way, i.e., 32581264 + 9734400 = 5708^2 + 3120^2 .

It is not an unprimeable number, because it can be changed into a prime (42315661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322349 + ... + 1322380.

It is an arithmetic number, because the mean of its divisors is an integer number (8198663).

Almost surely, 2^42315664 is an apocalyptic number.

It is an amenable number.

42315664 is a deficient number, since it is larger than the sum of its proper divisors (39670966).

42315664 is a wasteful number, since it uses less digits than its factorization.

42315664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2644737 (or 2644731 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 42315664 is about 6505.0491158791. The cubic root of 42315664 is about 348.4713303395.

Adding to 42315664 its reverse (46651324), we get a palindrome (88966988).

The spelling of 42315664 in words is "forty-two million, three hundred fifteen thousand, six hundred sixty-four".