72945215 has 16 divisors (see below), whose sum is σ = 105924672. Its totient is φ = 47076864.

The previous prime is 72945211. The next prime is 72945221. The reversal of 72945215 is 51254927.

It is a cyclic number.

It is not a de Polignac number, because 72945215 - 2² = 72945211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72945211) 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, 60704 + ... + 61893.

It is an arithmetic number, because the mean of its divisors is an integer number (6620292).

Almost surely, 2^72945215 is an apocalyptic number.

72945215 is a deficient number, since it is larger than the sum of its proper divisors (32979457).

72945215 is a wasteful number, since it uses less digits than its factorization.

72945215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122626.

The product of its digits is 25200, while the sum is 35.

The square root of 72945215 is about 8540.7970939486. The cubic root of 72945215 is about 417.8293431999.

The spelling of 72945215 in words is "seventy-two million, nine hundred forty-five thousand, two hundred fifteen".