56809261 has 2 divisors, whose sum is σ = 56809262. Its totient is φ = 56809260.

The previous prime is 56809217. The next prime is 56809307. The reversal of 56809261 is 16290865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56340036 + 469225 = 7506^2 + 685^2 .

It is a cyclic number.

It is not a de Polignac number, because 56809261 - 2⁷ = 56809133 is a prime.

It is a super-2 number, since 2×56809261² = 6454584270732242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56809261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56806261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28404630 + 28404631.

It is an arithmetic number, because the mean of its divisors is an integer number (28404631).

Almost surely, 2^56809261 is an apocalyptic number.

It is an amenable number.

56809261 is a deficient number, since it is larger than the sum of its proper divisors (1).

56809261 is an equidigital number, since it uses as much as digits as its factorization.

56809261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 56809261 is about 7537.1918510809. The cubic root of 56809261 is about 384.4203589893.

It can be divided in two parts, 5680 and 9261, that added together give a palindrome (14941).

The spelling of 56809261 in words is "fifty-six million, eight hundred nine thousand, two hundred sixty-one".