312540243 has 8 divisors (see below), whose sum is σ = 419129808. Its totient is φ = 207155424.

The previous prime is 312540209. The next prime is 312540247. The reversal of 312540243 is 342045213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 312540243 - 2¹⁷ = 312409171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312540247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300580 + ... + 301617.

It is an arithmetic number, because the mean of its divisors is an integer number (52391226).

Almost surely, 2^312540243 is an apocalyptic number.

312540243 is a deficient number, since it is larger than the sum of its proper divisors (106589565).

312540243 is a wasteful number, since it uses less digits than its factorization.

312540243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602373.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 312540243 is about 17678.8077369488. The cubic root of 312540243 is about 678.6335325806.

Adding to 312540243 its reverse (342045213), we get a palindrome (654585456).

The spelling of 312540243 in words is "three hundred twelve million, five hundred forty thousand, two hundred forty-three".