64123522 has 4 divisors (see below), whose sum is σ = 96185286. Its totient is φ = 32061760.

The previous prime is 64123513. The next prime is 64123529. The reversal of 64123522 is 22532146.

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., 37197801 + 26925721 = 6099^2 + 5189^2 .

It is a super-2 number, since 2×64123522² = 8223652147368968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64123529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16030879 + ... + 16030882.

Almost surely, 2^64123522 is an apocalyptic number.

64123522 is a deficient number, since it is larger than the sum of its proper divisors (32061764).

64123522 is a wasteful number, since it uses less digits than its factorization.

64123522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32061763.

The product of its digits is 2880, while the sum is 25.

The square root of 64123522 is about 8007.7164035697. The cubic root of 64123522 is about 400.2571721208.

Adding to 64123522 its reverse (22532146), we get a palindrome (86655668).

The spelling of 64123522 in words is "sixty-four million, one hundred twenty-three thousand, five hundred twenty-two".