64070531 has 4 divisors (see below), whose sum is σ = 73223472. Its totient is φ = 54917592.

The previous prime is 64070509. The next prime is 64070533. The reversal of 64070531 is 13507046.

64070531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64070531 is a prime.

It is a super-2 number, since 2×64070531² = 8210065885243922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64070531.

It is not an unprimeable number, because it can be changed into a prime (64070533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4576460 + ... + 4576473.

It is an arithmetic number, because the mean of its divisors is an integer number (18305868).

Almost surely, 2^64070531 is an apocalyptic number.

64070531 is a deficient number, since it is larger than the sum of its proper divisors (9152941).

64070531 is an equidigital number, since it uses as much as digits as its factorization.

64070531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9152940.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 64070531 is about 8004.4069736614. The cubic root of 64070531 is about 400.1468856383.

Adding to 64070531 its reverse (13507046), we get a palindrome (77577577).

The spelling of 64070531 in words is "sixty-four million, seventy thousand, five hundred thirty-one".