72225287 has 2 divisors, whose sum is σ = 72225288. Its totient is φ = 72225286.

The previous prime is 72225277. The next prime is 72225311. The reversal of 72225287 is 78252227.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72225287 - 2⁸ = 72225031 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72225277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36112643 + 36112644.

It is an arithmetic number, because the mean of its divisors is an integer number (36112644).

Almost surely, 2^72225287 is an apocalyptic number.

72225287 is a deficient number, since it is larger than the sum of its proper divisors (1).

72225287 is an equidigital number, since it uses as much as digits as its factorization.

72225287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31360, while the sum is 35.

The square root of 72225287 is about 8498.5461697869. The cubic root of 72225287 is about 416.4502163955.

The spelling of 72225287 in words is "seventy-two million, two hundred twenty-five thousand, two hundred eighty-seven".