64245531 has 16 divisors (see below), whose sum is σ = 98034944. Its totient is φ = 36660384.

The previous prime is 64245523. The next prime is 64245551. The reversal of 64245531 is 13554246.

It is not a de Polignac number, because 64245531 - 2³ = 64245523 is a prime.

It is a super-2 number, since 2×64245531² = 8254976506943922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64245521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17361 + ... + 20733.

It is an arithmetic number, because the mean of its divisors is an integer number (6127184).

Almost surely, 2^64245531 is an apocalyptic number.

64245531 is a deficient number, since it is larger than the sum of its proper divisors (33789413).

64245531 is a wasteful number, since it uses less digits than its factorization.

64245531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290.

The product of its digits is 14400, while the sum is 30.

The square root of 64245531 is about 8015.3309975322. The cubic root of 64245531 is about 400.5108701681.

Adding to 64245531 its reverse (13554246), we get a palindrome (77799777).

The spelling of 64245531 in words is "sixty-four million, two hundred forty-five thousand, five hundred thirty-one".