56321811 has 64 divisors (see below), whose sum is σ = 104330240. Its totient is φ = 29603232.

The previous prime is 56321809. The next prime is 56321831. The reversal of 56321811 is 11812365.

56321811 is a `hidden beast` number, since 5 + 632 + 18 + 11 = 666.

It is not a de Polignac number, because 56321811 - 2¹ = 56321809 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (56321831) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 198876 + ... + 199158.

It is an arithmetic number, because the mean of its divisors is an integer number (1630160).

Almost surely, 2^56321811 is an apocalyptic number.

56321811 is a deficient number, since it is larger than the sum of its proper divisors (48008429).

56321811 is an equidigital number, since it uses as much as digits as its factorization.

56321811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 306 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 56321811 is about 7504.7858730280. The cubic root of 56321811 is about 383.3176970728.

The spelling of 56321811 in words is "fifty-six million, three hundred twenty-one thousand, eight hundred eleven".