64531115 has 12 divisors (see below), whose sum is σ = 85117872. Its totient is φ = 46931280.

The previous prime is 64531109. The next prime is 64531151. The reversal of 64531115 is 51113546.

It is not a de Polignac number, because 64531115 - 2¹⁰ = 64530091 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52727 + ... + 53936.

It is an arithmetic number, because the mean of its divisors is an integer number (7093156).

Almost surely, 2^64531115 is an apocalyptic number.

64531115 is a deficient number, since it is larger than the sum of its proper divisors (20586757).

64531115 is a wasteful number, since it uses less digits than its factorization.

64531115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106690 (or 106679 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The square root of 64531115 is about 8033.1261038278. The cubic root of 64531115 is about 401.1034428192.

Subtracting from 64531115 its reverse (51113546), we obtain a square (13417569 = 3663²).

It can be divided in two parts, 64531 and 115, that added together give a palindrome (64646).

The spelling of 64531115 in words is "sixty-four million, five hundred thirty-one thousand, one hundred fifteen".