64481143 has 4 divisors (see below), whose sum is σ = 65297440. Its totient is φ = 63664848.

The previous prime is 64481141. The next prime is 64481171. The reversal of 64481143 is 34118446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34118446 = 2 ⋅17059223.

It is a cyclic number.

It is not a de Polignac number, because 64481143 - 2¹ = 64481141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64481141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408030 + ... + 408187.

It is an arithmetic number, because the mean of its divisors is an integer number (16324360).

Almost surely, 2^64481143 is an apocalyptic number.

64481143 is a deficient number, since it is larger than the sum of its proper divisors (816297).

64481143 is an equidigital number, since it uses as much as digits as its factorization.

64481143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816296.

The product of its digits is 9216, while the sum is 31.

The square root of 64481143 is about 8030.0151307454. The cubic root of 64481143 is about 400.9998797685. Note that the first 3 decimals are identical.

Adding to 64481143 its reverse (34118446), we get a palindrome (98599589).

The spelling of 64481143 in words is "sixty-four million, four hundred eighty-one thousand, one hundred forty-three".