720540227 has 4 divisors (see below), whose sum is σ = 786043896. Its totient is φ = 655036560.

The previous prime is 720540203. The next prime is 720540229. The reversal of 720540227 is 722045027.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 720540227 - 2⁸ = 720539971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 720540227.

It is not an unprimeable number, because it can be changed into a prime (720540229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32751818 + ... + 32751839.

It is an arithmetic number, because the mean of its divisors is an integer number (196510974).

Almost surely, 2^720540227 is an apocalyptic number.

720540227 is a deficient number, since it is larger than the sum of its proper divisors (65503669).

720540227 is a wasteful number, since it uses less digits than its factorization.

720540227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65503668.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 720540227 is about 26842.8803782306. The cubic root of 720540227 is about 896.5050576999.

The spelling of 720540227 in words is "seven hundred twenty million, five hundred forty thousand, two hundred twenty-seven".