72317051 has 4 divisors (see below), whose sum is σ = 72475752. Its totient is φ = 72158352.

The previous prime is 72317041. The next prime is 72317081. The reversal of 72317051 is 15071327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15071327 = 181 ⋅83267.

It is a cyclic number.

It is not a de Polignac number, because 72317051 - 2¹⁴ = 72300667 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72317051.

It is not an unprimeable number, because it can be changed into a prime (72317041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78665 + ... + 79578.

It is an arithmetic number, because the mean of its divisors is an integer number (18118938).

Almost surely, 2^72317051 is an apocalyptic number.

72317051 is a deficient number, since it is larger than the sum of its proper divisors (158701).

72317051 is a wasteful number, since it uses less digits than its factorization.

72317051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158700.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 72317051 is about 8503.9432618051. The cubic root of 72317051 is about 416.6265118281.

Adding to 72317051 its reverse (15071327), we get a palindrome (87388378).

The spelling of 72317051 in words is "seventy-two million, three hundred seventeen thousand, fifty-one".