56155361 has 2 divisors, whose sum is σ = 56155362. Its totient is φ = 56155360.

The previous prime is 56155303. The next prime is 56155373. The reversal of 56155361 is 16355165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47004736 + 9150625 = 6856^2 + 3025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56155361 is a prime.

It is not a weakly prime, because it can be changed into another prime (56155261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28077680 + 28077681.

It is an arithmetic number, because the mean of its divisors is an integer number (28077681).

Almost surely, 2^56155361 is an apocalyptic number.

It is an amenable number.

56155361 is a deficient number, since it is larger than the sum of its proper divisors (1).

56155361 is an equidigital number, since it uses as much as digits as its factorization.

56155361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13500, while the sum is 32.

The square root of 56155361 is about 7493.6880773088. The cubic root of 56155361 is about 382.9397133259.

The spelling of 56155361 in words is "fifty-six million, one hundred fifty-five thousand, three hundred sixty-one".