73145215 has 16 divisors (see below), whose sum is σ = 103120416. Its totient is φ = 49104000.

The previous prime is 73145209. The next prime is 73145251. The reversal of 73145215 is 51254137.

It is a happy number.

It is not a de Polignac number, because 73145215 - 2⁵ = 73145183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50436 + ... + 51865.

It is an arithmetic number, because the mean of its divisors is an integer number (6445026).

Almost surely, 2^73145215 is an apocalyptic number.

73145215 is a deficient number, since it is larger than the sum of its proper divisors (29975201).

73145215 is a wasteful number, since it uses less digits than its factorization.

73145215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102330.

The product of its digits is 4200, while the sum is 28.

The square root of 73145215 is about 8552.4975884241. The cubic root of 73145215 is about 418.2108606240.

The spelling of 73145215 in words is "seventy-three million, one hundred forty-five thousand, two hundred fifteen".