312042031403 has 4 divisors (see below), whose sum is σ = 312640960968. Its totient is φ = 311443101840.

The previous prime is 312042031393. The next prime is 312042031453. The reversal of 312042031403 is 304130240213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304130240213 = 101963 ⋅2982751.

It is a cyclic number.

It is not a de Polignac number, because 312042031403 - 2²⁴ = 312025254187 is a prime.

It is a super-2 number, since 2×312042031403² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312042031453) 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, 299464001 + ... + 299465042.

It is an arithmetic number, because the mean of its divisors is an integer number (78160240242).

Almost surely, 2^312042031403 is an apocalyptic number.

312042031403 is a deficient number, since it is larger than the sum of its proper divisors (598929565).

312042031403 is an equidigital number, since it uses as much as digits as its factorization.

312042031403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598929564.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 312042031403 its reverse (304130240213), we get a palindrome (616172271616).

The spelling of 312042031403 in words is "three hundred twelve billion, forty-two million, thirty-one thousand, four hundred three".