56197261 has 2 divisors, whose sum is σ = 56197262. Its totient is φ = 56197260.

The previous prime is 56197237. The next prime is 56197277. The reversal of 56197261 is 16279165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52272900 + 3924361 = 7230^2 + 1981^2 .

It is a cyclic number.

It is not a de Polignac number, because 56197261 - 2⁷ = 56197133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56197261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56197201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28098630 + 28098631.

It is an arithmetic number, because the mean of its divisors is an integer number (28098631).

Almost surely, 2^56197261 is an apocalyptic number.

It is an amenable number.

56197261 is a deficient number, since it is larger than the sum of its proper divisors (1).

56197261 is an equidigital number, since it uses as much as digits as its factorization.

56197261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 37.

The square root of 56197261 is about 7496.4832421610. The cubic root of 56197261 is about 383.0349324032.

It can be divided in two parts, 5619 and 7261, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 56197261 in words is "fifty-six million, one hundred ninety-seven thousand, two hundred sixty-one".