73515865 has 8 divisors (see below), whose sum is σ = 88707528. Its totient is φ = 58487040.

The previous prime is 73515863. The next prime is 73515887. The reversal of 73515865 is 56851537.

It can be written as a sum of positive squares in 4 ways, for example, as 53824 + 73462041 = 232^2 + 8571^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73515865 - 2¹ = 73515863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73515863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39712 + ... + 41521.

It is an arithmetic number, because the mean of its divisors is an integer number (11088441).

Almost surely, 2^73515865 is an apocalyptic number.

It is an amenable number.

73515865 is a deficient number, since it is larger than the sum of its proper divisors (15191663).

73515865 is a wasteful number, since it uses less digits than its factorization.

73515865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81419.

The product of its digits is 126000, while the sum is 40.

The square root of 73515865 is about 8574.1393154065. The cubic root of 73515865 is about 418.9160731344.

The spelling of 73515865 in words is "seventy-three million, five hundred fifteen thousand, eight hundred sixty-five".