56440173 has 4 divisors (see below), whose sum is σ = 75253568. Its totient is φ = 37626780.

The previous prime is 56440159. The next prime is 56440193. The reversal of 56440173 is 37104465.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 56440173 - 2¹² = 56436077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56440173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56440103) 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, 9406693 + ... + 9406698.

It is an arithmetic number, because the mean of its divisors is an integer number (18813392).

Almost surely, 2^56440173 is an apocalyptic number.

It is an amenable number.

56440173 is a deficient number, since it is larger than the sum of its proper divisors (18813395).

56440173 is a wasteful number, since it uses less digits than its factorization.

56440173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18813394.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 56440173 is about 7512.6675022924. The cubic root of 56440173 is about 383.5860271282.

The spelling of 56440173 in words is "fifty-six million, four hundred forty thousand, one hundred seventy-three".