64216423 has 4 divisors (see below), whose sum is σ = 65952040. Its totient is φ = 62480808.

The previous prime is 64216403. The next prime is 64216433. The reversal of 64216423 is 32461246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32461246 = 2 ⋅16230623.

It is a cyclic number.

It is not a de Polignac number, because 64216423 - 2¹³ = 64208231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64216391 and 64216400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64216403) 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, 867753 + ... + 867826.

It is an arithmetic number, because the mean of its divisors is an integer number (16488010).

Almost surely, 2^64216423 is an apocalyptic number.

64216423 is a deficient number, since it is larger than the sum of its proper divisors (1735617).

64216423 is a wasteful number, since it uses less digits than its factorization.

64216423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735616.

The product of its digits is 6912, while the sum is 28.

The square root of 64216423 is about 8013.5150215121. The cubic root of 64216423 is about 400.4503739679.

Adding to 64216423 its reverse (32461246), we get a palindrome (96677669).

The spelling of 64216423 in words is "sixty-four million, two hundred sixteen thousand, four hundred twenty-three".