64324251 has 6 divisors (see below), whose sum is σ = 92912820. Its totient is φ = 42882828.

The previous prime is 64324237. The next prime is 64324283. The reversal of 64324251 is 15242346.

It is not a de Polignac number, because 64324251 - 2¹³ = 64316059 is a prime.

It is a super-2 number, since 2×64324251² = 8275218533422002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64324151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3573561 + ... + 3573578.

It is an arithmetic number, because the mean of its divisors is an integer number (15485470).

Almost surely, 2^64324251 is an apocalyptic number.

64324251 is a deficient number, since it is larger than the sum of its proper divisors (28588569).

64324251 is a wasteful number, since it uses less digits than its factorization.

64324251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7147145 (or 7147142 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 64324251 is about 8020.2400836883. The cubic root of 64324251 is about 400.6743852889.

Adding to 64324251 its reverse (15242346), we get a palindrome (79566597).

The spelling of 64324251 in words is "sixty-four million, three hundred twenty-four thousand, two hundred fifty-one".