64013231 has 8 divisors (see below), whose sum is σ = 64680000. Its totient is φ = 63349920.

The previous prime is 64013221. The next prime is 64013251. The reversal of 64013231 is 13231046.

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 64013231 - 2¹⁸ = 63751087 is a prime.

It is a super-2 number, since 2×64013231² = 8195387486118722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64013221) 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, 51386 + ... + 52616.

It is an arithmetic number, because the mean of its divisors is an integer number (8085000).

Almost surely, 2^64013231 is an apocalyptic number.

64013231 is a deficient number, since it is larger than the sum of its proper divisors (666769).

64013231 is a wasteful number, since it uses less digits than its factorization.

64013231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729.

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

The square root of 64013231 is about 8000.8268947653. The cubic root of 64013231 is about 400.0275626840.

Adding to 64013231 its reverse (13231046), we get a palindrome (77244277).

The spelling of 64013231 in words is "sixty-four million, thirteen thousand, two hundred thirty-one".