65272515 has 64 divisors (see below), whose sum is σ = 134479872. Its totient is φ = 26236800.

The previous prime is 65272513. The next prime is 65272523. The reversal of 65272515 is 51527256.

It is not a de Polignac number, because 65272515 - 2¹ = 65272513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (65272513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 34894 + ... + 36716.

It is an arithmetic number, because the mean of its divisors is an integer number (2101248).

Almost surely, 2^65272515 is an apocalyptic number.

65272515 is an abundant number, since it is smaller than the sum of its proper divisors (69207357).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65272515 is a wasteful number, since it uses less digits than its factorization.

65272515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880.

The product of its digits is 21000, while the sum is 33.

The square root of 65272515 is about 8079.1407340137. The cubic root of 65272515 is about 402.6336939977.

It can be divided in two parts, 6527251 and 5, that added together give a palindrome (6527256).

The spelling of 65272515 in words is "sixty-five million, two hundred seventy-two thousand, five hundred fifteen".