56142109 has 4 divisors (see below), whose sum is σ = 59444604. Its totient is φ = 52839616.

The previous prime is 56142091. The next prime is 56142127. The reversal of 56142109 is 90124165.

56142109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90124165 = 5 ⋅18024833.

It is an interprime number because it is at equal distance from previous prime (56142091) and next prime (56142127).

It can be written as a sum of positive squares in 2 ways, for example, as 51079609 + 5062500 = 7147^2 + 2250^2 .

It is a cyclic number.

It is not a de Polignac number, because 56142109 - 2²³ = 47753501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56142199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1651222 + ... + 1651255.

It is an arithmetic number, because the mean of its divisors is an integer number (14861151).

Almost surely, 2^56142109 is an apocalyptic number.

It is an amenable number.

56142109 is a deficient number, since it is larger than the sum of its proper divisors (3302495).

56142109 is a wasteful number, since it uses less digits than its factorization.

56142109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3302494.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 56142109 is about 7492.8038143275. The cubic root of 56142109 is about 382.9095878773.

The spelling of 56142109 in words is "fifty-six million, one hundred forty-two thousand, one hundred nine".