72257011 has 2 divisors, whose sum is σ = 72257012. Its totient is φ = 72257010.

The previous prime is 72256999. The next prime is 72257027. The reversal of 72257011 is 11075227.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (11075227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72257011 - 2⁵ = 72256979 is a prime.

It is not a weakly prime, because it can be changed into another prime (72227011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36128505 + 36128506.

It is an arithmetic number, because the mean of its divisors is an integer number (36128506).

Almost surely, 2^72257011 is an apocalyptic number.

72257011 is the 3802-nd centered decagonal number.

72257011 is a deficient number, since it is larger than the sum of its proper divisors (1).

72257011 is an equidigital number, since it uses as much as digits as its factorization.

72257011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 72257011 is about 8500.4124017603. The cubic root of 72257011 is about 416.5111808830.

The spelling of 72257011 in words is "seventy-two million, two hundred fifty-seven thousand, eleven".