64143321 has 24 divisors (see below), whose sum is σ = 94931424. Its totient is φ = 38206080.

The previous prime is 64143293. The next prime is 64143337. The reversal of 64143321 is 12334146.

It is not a de Polignac number, because 64143321 - 2¹⁸ = 63881177 is a prime.

It is a super-2 number, since 2×64143321² = 8228731257818082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64143291 and 64143300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64142321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147921 + ... + 148353.

It is an arithmetic number, because the mean of its divisors is an integer number (3955476).

Almost surely, 2^64143321 is an apocalyptic number.

It is an amenable number.

64143321 is a deficient number, since it is larger than the sum of its proper divisors (30788103).

64143321 is a wasteful number, since it uses less digits than its factorization.

64143321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581 (or 514 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 64143321 is about 8008.9525532369. The cubic root of 64143321 is about 400.2983628104.

Adding to 64143321 its reverse (12334146), we get a palindrome (76477467).

The spelling of 64143321 in words is "sixty-four million, one hundred forty-three thousand, three hundred twenty-one".