72228252091 has 2 divisors, whose sum is σ = 72228252092. Its totient is φ = 72228252090.

The previous prime is 72228252059. The next prime is 72228252133. The reversal of 72228252091 is 19025282227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72228252091 - 2⁵ = 72228252059 is a prime.

It is not a weakly prime, because it can be changed into another prime (72228250091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36114126045 + 36114126046.

It is an arithmetic number, because the mean of its divisors is an integer number (36114126046).

Almost surely, 2^72228252091 is an apocalyptic number.

72228252091 is a deficient number, since it is larger than the sum of its proper divisors (1).

72228252091 is an equidigital number, since it uses as much as digits as its factorization.

72228252091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 72228252091 in words is "seventy-two billion, two hundred twenty-eight million, two hundred fifty-two thousand, ninety-one".