56319945 has 16 divisors (see below), whose sum is σ = 98304192. Its totient is φ = 27306560.

The previous prime is 56319931. The next prime is 56319947. The reversal of 56319945 is 54991365.

It is not a de Polignac number, because 56319945 - 2⁷ = 56319817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56319897 and 56319906.

It is not an unprimeable number, because it can be changed into a prime (56319947) 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 in 15 ways as a sum of consecutive naturals, for example, 170502 + ... + 170831.

It is an arithmetic number, because the mean of its divisors is an integer number (6144012).

Almost surely, 2^56319945 is an apocalyptic number.

56319945 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56319945 is a deficient number, since it is larger than the sum of its proper divisors (41984247).

56319945 is a wasteful number, since it uses less digits than its factorization.

56319945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341352.

The product of its digits is 145800, while the sum is 42.

The square root of 56319945 is about 7504.6615513293. The cubic root of 56319945 is about 383.3134637884.

It can be divided in two parts, 5631 and 9945, that added together give a triangular number (15576 = T₁₇₆).

The spelling of 56319945 in words is "fifty-six million, three hundred nineteen thousand, nine hundred forty-five".