64172231 has 8 divisors (see below), whose sum is σ = 67205760. Its totient is φ = 61159032.

The previous prime is 64172221. The next prime is 64172233. The reversal of 64172231 is 13227146.

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 64172231 - 2¹⁸ = 63910087 is a prime.

It is a super-2 number, since 2×64172231² = 8236150463034722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64172231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64172233) 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, 1580 + ... + 11438.

It is an arithmetic number, because the mean of its divisors is an integer number (8400720).

Almost surely, 2^64172231 is an apocalyptic number.

64172231 is a deficient number, since it is larger than the sum of its proper divisors (3033529).

64172231 is a wasteful number, since it uses less digits than its factorization.

64172231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10165.

The product of its digits is 2016, while the sum is 26.

The square root of 64172231 is about 8010.7572051586. The cubic root of 64172231 is about 400.3584931939.

Adding to 64172231 its reverse (13227146), we get a palindrome (77399377).

The spelling of 64172231 in words is "sixty-four million, one hundred seventy-two thousand, two hundred thirty-one".