56142209 has 8 divisors (see below), whose sum is σ = 59520768. Its totient is φ = 52861680.

The previous prime is 56142199. The next prime is 56142223. The reversal of 56142209 is 90224165.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 56142209 - 2⁴ = 56142193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56142269) 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 7 ways as a sum of consecutive naturals, for example, 23327 + ... + 25620.

It is an arithmetic number, because the mean of its divisors is an integer number (7440096).

Almost surely, 2^56142209 is an apocalyptic number.

It is an amenable number.

56142209 is a deficient number, since it is larger than the sum of its proper divisors (3378559).

56142209 is a wasteful number, since it uses less digits than its factorization.

56142209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49015.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 56142209 is about 7492.8104873939. The cubic root of 56142209 is about 382.9098152226.

The spelling of 56142209 in words is "fifty-six million, one hundred forty-two thousand, two hundred nine".