72157195 has 16 divisors (see below), whose sum is σ = 95528160. Its totient is φ = 51884800.

The previous prime is 72157159. The next prime is 72157199. The reversal of 72157195 is 59175127.

It is a de Polignac number, because none of the positive numbers 2^k-72157195 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72157199) 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, 2476 + ... + 12265.

It is an arithmetic number, because the mean of its divisors is an integer number (5970510).

Almost surely, 2^72157195 is an apocalyptic number.

72157195 is a deficient number, since it is larger than the sum of its proper divisors (23370965).

72157195 is a wasteful number, since it uses less digits than its factorization.

72157195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14846.

The product of its digits is 22050, while the sum is 37.

The square root of 72157195 is about 8494.5391281693. The cubic root of 72157195 is about 416.3193026701.

The spelling of 72157195 in words is "seventy-two million, one hundred fifty-seven thousand, one hundred ninety-five".