56033281 has 4 divisors (see below), whose sum is σ = 57547732. Its totient is φ = 54518832.

The previous prime is 56033203. The next prime is 56033287. The reversal of 56033281 is 18233065.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30074256 + 25959025 = 5484^2 + 5095^2 .

It is a cyclic number.

It is not a de Polignac number, because 56033281 - 2¹⁵ = 56000513 is a prime.

It is a super-2 number, since 2×56033281² = 6279457159249922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56033287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 757170 + ... + 757243.

It is an arithmetic number, because the mean of its divisors is an integer number (14386933).

It is a Proth number, since it is equal to 855 ⋅ 2¹⁶ + 1 and 855 < 2¹⁶.

Almost surely, 2^56033281 is an apocalyptic number.

It is an amenable number.

56033281 is a deficient number, since it is larger than the sum of its proper divisors (1514451).

56033281 is a wasteful number, since it uses less digits than its factorization.

56033281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514450.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 56033281 is about 7485.5381236087. The cubic root of 56033281 is about 382.6620123341.

The spelling of 56033281 in words is "fifty-six million, thirty-three thousand, two hundred eighty-one".