64533442 has 4 divisors (see below), whose sum is σ = 96800166. Its totient is φ = 32266720.

The previous prime is 64533407. The next prime is 64533451. The reversal of 64533442 is 24433546.

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., 64496961 + 36481 = 8031^2 + 191^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16133359 + ... + 16133362.

Almost surely, 2^64533442 is an apocalyptic number.

64533442 is a deficient number, since it is larger than the sum of its proper divisors (32266724).

64533442 is a wasteful number, since it uses less digits than its factorization.

64533442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32266723.

The product of its digits is 34560, while the sum is 31.

The square root of 64533442 is about 8033.2709402833. The cubic root of 64533442 is about 401.1082640412.

Adding to 64533442 its reverse (24433546), we get a palindrome (88966988).

The spelling of 64533442 in words is "sixty-four million, five hundred thirty-three thousand, four hundred forty-two".