72236501 has 2 divisors, whose sum is σ = 72236502. Its totient is φ = 72236500.

The previous prime is 72236497. The next prime is 72236503. The reversal of 72236501 is 10563227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36893476 + 35343025 = 6074^2 + 5945^2 .

It is an emirp because it is prime and its reverse (10563227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72236501 - 2² = 72236497 is a prime.

It is a super-2 number, since 2×72236501² = 10436224153446002, which contains 22 as substring.

Together with 72236503, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72236503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36118250 + 36118251.

It is an arithmetic number, because the mean of its divisors is an integer number (36118251).

Almost surely, 2^72236501 is an apocalyptic number.

It is an amenable number.

72236501 is a deficient number, since it is larger than the sum of its proper divisors (1).

72236501 is an equidigital number, since it uses as much as digits as its factorization.

72236501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 72236501 is about 8499.2059040830. The cubic root of 72236501 is about 416.4717685473.

Adding to 72236501 its reverse (10563227), we get a palindrome (82799728).

The spelling of 72236501 in words is "seventy-two million, two hundred thirty-six thousand, five hundred one".