64413251 has 8 divisors (see below), whose sum is σ = 74304000. Its totient is φ = 54694728.

The previous prime is 64413247. The next prime is 64413253. The reversal of 64413251 is 15231446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64413251 - 2² = 64413247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64413251.

It is not an unprimeable number, because it can be changed into a prime (64413253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42251 + ... + 43748.

It is an arithmetic number, because the mean of its divisors is an integer number (9288000).

Almost surely, 2^64413251 is an apocalyptic number.

64413251 is a deficient number, since it is larger than the sum of its proper divisors (9890749).

64413251 is a wasteful number, since it uses less digits than its factorization.

64413251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86113.

The product of its digits is 2880, while the sum is 26.

The square root of 64413251 is about 8025.7866281132. The cubic root of 64413251 is about 400.8590931598.

Adding to 64413251 its reverse (15231446), we get a palindrome (79644697).

The spelling of 64413251 in words is "sixty-four million, four hundred thirteen thousand, two hundred fifty-one".