312120543 has 24 divisors (see below), whose sum is σ = 509589120. Its totient is φ = 168966000.

The previous prime is 312120541. The next prime is 312120569. The reversal of 312120543 is 345021213.

It is not a de Polignac number, because 312120543 - 2¹ = 312120541 is a prime.

It is a super-2 number, since 2×312120543² = 194838466725229698, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312120541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53083 + ... + 58668.

It is an arithmetic number, because the mean of its divisors is an integer number (21232880).

Almost surely, 2^312120543 is an apocalyptic number.

312120543 is a deficient number, since it is larger than the sum of its proper divisors (197468577).

312120543 is a wasteful number, since it uses less digits than its factorization.

312120543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111787 (or 111780 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 312120543 is about 17666.9336049016. The cubic root of 312120543 is about 678.3296249632.

Adding to 312120543 its reverse (345021213), we get a palindrome (657141756).

The spelling of 312120543 in words is "three hundred twelve million, one hundred twenty thousand, five hundred forty-three".