64215393 has 16 divisors (see below), whose sum is σ = 93717696. Its totient is φ = 38787840.

The previous prime is 64215343. The next prime is 64215401. The reversal of 64215393 is 39351246.

It is not a de Polignac number, because 64215393 - 2⁶ = 64215329 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (64215323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7221 + ... + 13437.

It is an arithmetic number, because the mean of its divisors is an integer number (5857356).

Almost surely, 2^64215393 is an apocalyptic number.

It is an amenable number.

64215393 is a deficient number, since it is larger than the sum of its proper divisors (29502303).

64215393 is a wasteful number, since it uses less digits than its factorization.

64215393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6544.

The product of its digits is 19440, while the sum is 33.

The square root of 64215393 is about 8013.4507548247. The cubic root of 64215393 is about 400.4482329471.

It can be divided in two parts, 642153 and 93, that added together give a palindrome (642246).

The spelling of 64215393 in words is "sixty-four million, two hundred fifteen thousand, three hundred ninety-three".