56172533 has 2 divisors, whose sum is σ = 56172534. Its totient is φ = 56172532.

The previous prime is 56172517. The next prime is 56172593. The reversal of 56172533 is 33527165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38850289 + 17322244 = 6233^2 + 4162^2 .

It is a cyclic number.

It is not a de Polignac number, because 56172533 - 2⁴ = 56172517 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56172533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56172503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28086266 + 28086267.

It is an arithmetic number, because the mean of its divisors is an integer number (28086267).

Almost surely, 2^56172533 is an apocalyptic number.

It is an amenable number.

56172533 is a deficient number, since it is larger than the sum of its proper divisors (1).

56172533 is an equidigital number, since it uses as much as digits as its factorization.

56172533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900, while the sum is 32.

The square root of 56172533 is about 7494.8337539935. The cubic root of 56172533 is about 382.9787429660.

Adding to 56172533 its reverse (33527165), we get a palindrome (89699698).

The spelling of 56172533 in words is "fifty-six million, one hundred seventy-two thousand, five hundred thirty-three".