64220042 has 8 divisors (see below), whose sum is σ = 97284132. Its totient is φ = 31792000.

The previous prime is 64220041. The next prime is 64220053. The reversal of 64220042 is 24002246.

It can be written as a sum of positive squares in 2 ways, for example, as 55815841 + 8404201 = 7471^2 + 2899^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 64219996 and 64220023.

It is not an unprimeable number, because it can be changed into a prime (64220041) 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, 158759 + ... + 159162.

Almost surely, 2^64220042 is an apocalyptic number.

64220042 is a deficient number, since it is larger than the sum of its proper divisors (33064090).

64220042 is a wasteful number, since it uses less digits than its factorization.

64220042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318024.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 64220042 is about 8013.7408243591. The cubic root of 64220042 is about 400.4578964604.

Adding to 64220042 its reverse (24002246), we get a palindrome (88222288).

The spelling of 64220042 in words is "sixty-four million, two hundred twenty thousand, forty-two".