72203444371 has 2 divisors, whose sum is σ = 72203444372. Its totient is φ = 72203444370.

The previous prime is 72203444333. The next prime is 72203444399. The reversal of 72203444371 is 17344430227.

It is a strong prime.

It is an emirp because it is prime and its reverse (17344430227) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72203444371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72203444371.

It is not a weakly prime, because it can be changed into another prime (72203444671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36101722185 + 36101722186.

It is an arithmetic number, because the mean of its divisors is an integer number (36101722186).

Almost surely, 2^72203444371 is an apocalyptic number.

72203444371 is a deficient number, since it is larger than the sum of its proper divisors (1).

72203444371 is an equidigital number, since it uses as much as digits as its factorization.

72203444371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 37.

Adding to 72203444371 its reverse (17344430227), we get a palindrome (89547874598).

The spelling of 72203444371 in words is "seventy-two billion, two hundred three million, four hundred forty-four thousand, three hundred seventy-one".