72225311 has 2 divisors, whose sum is σ = 72225312. Its totient is φ = 72225310.

The previous prime is 72225287. The next prime is 72225343. The reversal of 72225311 is 11352227.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72225311 - 2¹⁸ = 71963167 is a prime.

It is equal to p_4241264 and since 72225311 and 4241264 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72225211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36112655 + 36112656.

It is an arithmetic number, because the mean of its divisors is an integer number (36112656).

Almost surely, 2^72225311 is an apocalyptic number.

72225311 is a deficient number, since it is larger than the sum of its proper divisors (1).

72225311 is an equidigital number, since it uses as much as digits as its factorization.

72225311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 23.

The square root of 72225311 is about 8498.5475817930. The cubic root of 72225311 is about 416.4502625234.

Adding to 72225311 its reverse (11352227), we get a palindrome (83577538).

The spelling of 72225311 in words is "seventy-two million, two hundred twenty-five thousand, three hundred eleven".