64133231 has 8 divisors (see below), whose sum is σ = 68071104. Its totient is φ = 60213760.

The previous prime is 64133219. The next prime is 64133257. The reversal of 64133231 is 13233146.

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

It is a cyclic number.

It is not a de Polignac number, because 64133231 - 2¹⁰ = 64132207 is a prime.

It is a super-2 number, since 2×64133231² = 8226142636998722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64133197 and 64133206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64133281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2951 + ... + 11703.

It is an arithmetic number, because the mean of its divisors is an integer number (8508888).

Almost surely, 2^64133231 is an apocalyptic number.

64133231 is a deficient number, since it is larger than the sum of its proper divisors (3937873).

64133231 is a wasteful number, since it uses less digits than its factorization.

64133231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9201.

The product of its digits is 1296, while the sum is 23.

The square root of 64133231 is about 8008.3226083869. The cubic root of 64133231 is about 400.2773722005.

Adding to 64133231 its reverse (13233146), we get a palindrome (77366377).

The spelling of 64133231 in words is "sixty-four million, one hundred thirty-three thousand, two hundred thirty-one".