64023231 has 4 divisors (see below), whose sum is σ = 85364312. Its totient is φ = 42682152.

The previous prime is 64023229. The next prime is 64023247. The reversal of 64023231 is 13232046.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64023231 - 2¹ = 64023229 is a prime.

It is a super-2 number, since 2×64023231² = 8197948215358722, 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 = 64023198 and 64023207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64023131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10670536 + ... + 10670541.

It is an arithmetic number, because the mean of its divisors is an integer number (21341078).

Almost surely, 2^64023231 is an apocalyptic number.

64023231 is a deficient number, since it is larger than the sum of its proper divisors (21341081).

64023231 is a wasteful number, since it uses less digits than its factorization.

64023231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21341080.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 64023231 is about 8001.4518057663. The cubic root of 64023231 is about 400.0483920620.

Adding to 64023231 its reverse (13232046), we get a palindrome (77255277).

It can be divided in two parts, 640 and 23231, that added together give a triangular number (23871 = T₂₁₈).

The spelling of 64023231 in words is "sixty-four million, twenty-three thousand, two hundred thirty-one".