312020132231 has 4 divisors (see below), whose sum is σ = 312167801232. Its totient is φ = 311872463232.

The previous prime is 312020132209. The next prime is 312020132269. The reversal of 312020132231 is 132231020213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132231020213 = 239 ⋅553267867.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312020132231 is a prime.

It is a super-2 number, since 2×312020132231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312020131231) 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, 73831331 + ... + 73835556.

It is an arithmetic number, because the mean of its divisors is an integer number (78041950308).

Almost surely, 2^312020132231 is an apocalyptic number.

312020132231 is a deficient number, since it is larger than the sum of its proper divisors (147669001).

312020132231 is a wasteful number, since it uses less digits than its factorization.

312020132231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147669000.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 312020132231 its reverse (132231020213), we get a palindrome (444251152444).

The spelling of 312020132231 in words is "three hundred twelve billion, twenty million, one hundred thirty-two thousand, two hundred thirty-one".