56211909 has 8 divisors (see below), whose sum is σ = 80714592. Its totient is φ = 34591920.

The previous prime is 56211893. The next prime is 56211913. The reversal of 56211909 is 90911265.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56211909 - 2⁴ = 56211893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56211909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56211919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 720627 + ... + 720704.

It is an arithmetic number, because the mean of its divisors is an integer number (10089324).

Almost surely, 2^56211909 is an apocalyptic number.

It is an amenable number.

56211909 is a deficient number, since it is larger than the sum of its proper divisors (24502683).

56211909 is a wasteful number, since it uses less digits than its factorization.

56211909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441347.

The product of its (nonzero) digits is 4860, while the sum is 33.

The square root of 56211909 is about 7497.4601699509. The cubic root of 56211909 is about 383.0682092817.

The spelling of 56211909 in words is "fifty-six million, two hundred eleven thousand, nine hundred nine".