64031231 has 8 divisors (see below), whose sum is σ = 73961424. Its totient is φ = 54785920.

The previous prime is 64031203. The next prime is 64031243. The reversal of 64031231 is 13213046.

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 64031231 - 2⁶ = 64031167 is a prime.

It is a super-2 number, since 2×64031231² = 8199997086750722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64031251) 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, 171020 + ... + 171393.

It is an arithmetic number, because the mean of its divisors is an integer number (9245178).

Almost surely, 2^64031231 is an apocalyptic number.

64031231 is a deficient number, since it is larger than the sum of its proper divisors (9930193).

64031231 is a wasteful number, since it uses less digits than its factorization.

64031231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342441.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 64031231 is about 8001.9516994293. The cubic root of 64031231 is about 400.0650540027.

Adding to 64031231 its reverse (13213046), we get a palindrome (77244277).

The spelling of 64031231 in words is "sixty-four million, thirty-one thousand, two hundred thirty-one".