56142013 has 4 divisors (see below), whose sum is σ = 56159740. Its totient is φ = 56124288.

The previous prime is 56141983. The next prime is 56142019. The reversal of 56142013 is 31024165.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16426809 + 39715204 = 4053^2 + 6302^2 .

It is a cyclic number.

It is not a de Polignac number, because 56142013 - 2²⁵ = 22587581 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 (56142019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2670 + ... + 10927.

It is an arithmetic number, because the mean of its divisors is an integer number (14039935).

Almost surely, 2^56142013 is an apocalyptic number.

It is an amenable number.

56142013 is a deficient number, since it is larger than the sum of its proper divisors (17727).

56142013 is a wasteful number, since it uses less digits than its factorization.

56142013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17726.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 56142013 is about 7492.7974081781. The cubic root of 56142013 is about 382.9093696256.

Adding to 56142013 its reverse (31024165), we get a palindrome (87166178).

The spelling of 56142013 in words is "fifty-six million, one hundred forty-two thousand, thirteen".