64551233 has 4 divisors (see below), whose sum is σ = 65178048. Its totient is φ = 63924420.

The previous prime is 64551211. The next prime is 64551239. The reversal of 64551233 is 33215546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64551233 - 2⁶ = 64551169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64551196 and 64551205.

It is not an unprimeable number, because it can be changed into a prime (64551239) 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, 313253 + ... + 313458.

It is an arithmetic number, because the mean of its divisors is an integer number (16294512).

Almost surely, 2^64551233 is an apocalyptic number.

It is an amenable number.

64551233 is a deficient number, since it is larger than the sum of its proper divisors (626815).

64551233 is a wasteful number, since it uses less digits than its factorization.

64551233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626814.

The product of its digits is 10800, while the sum is 29.

The square root of 64551233 is about 8034.3781962265. The cubic root of 64551233 is about 401.1451207015.

Adding to 64551233 its reverse (33215546), we get a palindrome (97766779).

The spelling of 64551233 in words is "sixty-four million, five hundred fifty-one thousand, two hundred thirty-three".