56206109 has 2 divisors, whose sum is σ = 56206110. Its totient is φ = 56206108.

The previous prime is 56206103. The next prime is 56206133. The reversal of 56206109 is 90160265.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43850884 + 12355225 = 6622^2 + 3515^2 .

It is a cyclic number.

It is not a de Polignac number, because 56206109 - 2⁴ = 56206093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56206103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28103054 + 28103055.

It is an arithmetic number, because the mean of its divisors is an integer number (28103055).

Almost surely, 2^56206109 is an apocalyptic number.

It is an amenable number.

56206109 is a deficient number, since it is larger than the sum of its proper divisors (1).

56206109 is an equidigital number, since it uses as much as digits as its factorization.

56206109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 56206109 is about 7497.0733623195. The cubic root of 56206109 is about 383.0550337104.

The spelling of 56206109 in words is "fifty-six million, two hundred six thousand, one hundred nine".