56533549 has 2 divisors, whose sum is σ = 56533550. Its totient is φ = 56533548.

The previous prime is 56533523. The next prime is 56533559. The reversal of 56533549 is 94533565.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56520324 + 13225 = 7518^2 + 115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56533549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56533559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28266774 + 28266775.

It is an arithmetic number, because the mean of its divisors is an integer number (28266775).

Almost surely, 2^56533549 is an apocalyptic number.

It is an amenable number.

56533549 is a deficient number, since it is larger than the sum of its proper divisors (1).

56533549 is an equidigital number, since it uses as much as digits as its factorization.

56533549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 243000, while the sum is 40.

The square root of 56533549 is about 7518.8795042879. The cubic root of 56533549 is about 383.7974486064.

The spelling of 56533549 in words is "fifty-six million, five hundred thirty-three thousand, five hundred forty-nine".