56193661 has 2 divisors, whose sum is σ = 56193662. Its totient is φ = 56193660.

The previous prime is 56193601. The next prime is 56193667. The reversal of 56193661 is 16639165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34047225 + 22146436 = 5835^2 + 4706^2 .

It is a cyclic number.

It is not a de Polignac number, because 56193661 - 2⁹ = 56193149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56193661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56193667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28096830 + 28096831.

It is an arithmetic number, because the mean of its divisors is an integer number (28096831).

Almost surely, 2^56193661 is an apocalyptic number.

It is an amenable number.

56193661 is a deficient number, since it is larger than the sum of its proper divisors (1).

56193661 is an equidigital number, since it uses as much as digits as its factorization.

56193661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 37.

The square root of 56193661 is about 7496.2431257264. The cubic root of 56193661 is about 383.0267531481.

The spelling of 56193661 in words is "fifty-six million, one hundred ninety-three thousand, six hundred sixty-one".