72545227 has 2 divisors, whose sum is σ = 72545228. Its totient is φ = 72545226.

The previous prime is 72545203. The next prime is 72545261. The reversal of 72545227 is 72254527.

It is a happy number.

It is an a-pointer prime, because the next prime (72545261) can be obtained adding 72545227 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72545227 - 2¹⁵ = 72512459 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72545192 and 72545201.

It is not a weakly prime, because it can be changed into another prime (72545027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36272613 + 36272614.

It is an arithmetic number, because the mean of its divisors is an integer number (36272614).

Almost surely, 2^72545227 is an apocalyptic number.

72545227 is a deficient number, since it is larger than the sum of its proper divisors (1).

72545227 is an equidigital number, since it uses as much as digits as its factorization.

72545227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39200, while the sum is 34.

The square root of 72545227 is about 8517.3485897901. The cubic root of 72545227 is about 417.0642341534.

The spelling of 72545227 in words is "seventy-two million, five hundred forty-five thousand, two hundred twenty-seven".