64450531 has 8 divisors (see below), whose sum is σ = 67334400. Its totient is φ = 61573512.

The previous prime is 64450511. The next prime is 64450537. The reversal of 64450531 is 13505446.

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 64450531 - 2⁷ = 64450403 is a prime.

It is a super-2 number, since 2×64450531² = 8307741892363922, which contains 22 as substring.

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 64450531.

It is not an unprimeable number, because it can be changed into a prime (64450537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31176 + ... + 33178.

It is an arithmetic number, because the mean of its divisors is an integer number (8416800).

Almost surely, 2^64450531 is an apocalyptic number.

64450531 is a deficient number, since it is larger than the sum of its proper divisors (2883869).

64450531 is a wasteful number, since it uses less digits than its factorization.

64450531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3425.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 64450531 is about 8028.1088059393. The cubic root of 64450531 is about 400.9364123690.

Adding to 64450531 its reverse (13505446), we get a palindrome (77955977).

The spelling of 64450531 in words is "sixty-four million, four hundred fifty thousand, five hundred thirty-one".