56231121 has 8 divisors (see below), whose sum is σ = 79385184. Its totient is φ = 35282240.

The previous prime is 56231107. The next prime is 56231137. The reversal of 56231121 is 12113265.

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 56231121 - 2¹¹ = 56229073 is a prime.

It is a super-3 number, since 3×56231121³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (56231101) 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, 551235 + ... + 551336.

It is an arithmetic number, because the mean of its divisors is an integer number (9923148).

Almost surely, 2^56231121 is an apocalyptic number.

56231121 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

56231121 is a deficient number, since it is larger than the sum of its proper divisors (23154063).

56231121 is a wasteful number, since it uses less digits than its factorization.

56231121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102591.

The product of its digits is 360, while the sum is 21.

The square root of 56231121 is about 7498.7412943773. The cubic root of 56231121 is about 383.1118457535. Note that the first 3 decimals are identical.

Adding to 56231121 its reverse (12113265), we get a palindrome (68344386).

The spelling of 56231121 in words is "fifty-six million, two hundred thirty-one thousand, one hundred twenty-one".