56142321 has 16 divisors (see below), whose sum is σ = 79161600. Its totient is φ = 35293968.

The previous prime is 56142319. The next prime is 56142323. The reversal of 56142321 is 12324165.

It is an interprime number because it is at equal distance from previous prime (56142319) and next prime (56142323).

It is not a de Polignac number, because 56142321 - 2¹ = 56142319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56142291 and 56142300.

It is not an unprimeable number, because it can be changed into a prime (56142323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10770 + ... + 15108.

It is an arithmetic number, because the mean of its divisors is an integer number (4947600).

Almost surely, 2^56142321 is an apocalyptic number.

It is an amenable number.

56142321 is a deficient number, since it is larger than the sum of its proper divisors (23019279).

56142321 is a wasteful number, since it uses less digits than its factorization.

56142321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4588.

The product of its digits is 1440, while the sum is 24.

The square root of 56142321 is about 7492.8179612213. The cubic root of 56142321 is about 382.9100698491.

Adding to 56142321 its reverse (12324165), we get a palindrome (68466486).

The spelling of 56142321 in words is "fifty-six million, one hundred forty-two thousand, three hundred twenty-one".