64135233 has 14 divisors (see below), whose sum is σ = 96159954. Its totient is φ = 42756336.

The previous prime is 64135219. The next prime is 64135243. The reversal of 64135233 is 33253146.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 63872064 + 263169 = 7992^2 + 513^2 .

It is not a de Polignac number, because 64135233 - 2²⁵ = 30580801 is a prime.

It is a super-2 number, since 2×64135233² = 8226656223928578, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 64135197 and 64135206.

It is not an unprimeable number, because it can be changed into a prime (64135243) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 43260 + ... + 44717.

Almost surely, 2^64135233 is an apocalyptic number.

It is an amenable number.

64135233 is a deficient number, since it is larger than the sum of its proper divisors (32024721).

64135233 is an frugal number, since it uses more digits than its factorization.

64135233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87995 (or 87980 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 64135233 is about 8008.4476023759. The cubic root of 64135233 is about 400.2815372122.

Adding to 64135233 its reverse (33253146), we get a palindrome (97388379).

The spelling of 64135233 in words is "sixty-four million, one hundred thirty-five thousand, two hundred thirty-three".