56720211 has 16 divisors (see below), whose sum is σ = 81782784. Its totient is φ = 34830464.

The previous prime is 56720207. The next prime is 56720239. The reversal of 56720211 is 11202765.

It is a cyclic number.

It is not a de Polignac number, because 56720211 - 2² = 56720207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56720611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9435 + ... + 14228.

It is an arithmetic number, because the mean of its divisors is an integer number (5111424).

Almost surely, 2^56720211 is an apocalyptic number.

56720211 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

56720211 is a deficient number, since it is larger than the sum of its proper divisors (25062573).

56720211 is a wasteful number, since it uses less digits than its factorization.

56720211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23730.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 56720211 is about 7531.2821617571. The cubic root of 56720211 is about 384.2193909616.

Adding to 56720211 its reverse (11202765), we get a palindrome (67922976).

The spelling of 56720211 in words is "fifty-six million, seven hundred twenty thousand, two hundred eleven".