56181345 has 32 divisors (see below), whose sum is σ = 103835520. Its totient is φ = 25635840.

The previous prime is 56181343. The next prime is 56181361. The reversal of 56181345 is 54318165.

It is not a de Polignac number, because 56181345 - 2¹ = 56181343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (56181343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7210 + ... + 12819.

It is an arithmetic number, because the mean of its divisors is an integer number (3244860).

Almost surely, 2^56181345 is an apocalyptic number.

56181345 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56181345 is a deficient number, since it is larger than the sum of its proper divisors (47654175).

56181345 is a wasteful number, since it uses less digits than its factorization.

56181345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20065.

The product of its digits is 14400, while the sum is 33.

The square root of 56181345 is about 7495.4216025518. The cubic root of 56181345 is about 382.9987683654.

The spelling of 56181345 in words is "fifty-six million, one hundred eighty-one thousand, three hundred forty-five".