56447533 has 4 divisors (see below), whose sum is σ = 57973180. Its totient is φ = 54921888.

The previous prime is 56447527. The next prime is 56447539. The reversal of 56447533 is 33574465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33574465 = 5 ⋅6714893.

It is an interprime number because it is at equal distance from previous prime (56447527) and next prime (56447539).

It can be written as a sum of positive squares in 2 ways, for example, as 48135844 + 8311689 = 6938^2 + 2883^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56447533 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1525609 = 56447533 / (5 + 6 + 4 + 4 + 7 + 5 + 3 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56447492 and 56447501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56447539) 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, 762768 + ... + 762841.

It is an arithmetic number, because the mean of its divisors is an integer number (14493295).

Almost surely, 2^56447533 is an apocalyptic number.

It is an amenable number.

56447533 is a deficient number, since it is larger than the sum of its proper divisors (1525647).

56447533 is a wasteful number, since it uses less digits than its factorization.

56447533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525646.

The product of its digits is 151200, while the sum is 37.

The square root of 56447533 is about 7513.1573256521. The cubic root of 56447533 is about 383.6027000658.

The spelling of 56447533 in words is "fifty-six million, four hundred forty-seven thousand, five hundred thirty-three".