312042403 has 4 divisors (see below), whose sum is σ = 325609488. Its totient is φ = 298475320.

The previous prime is 312042343. The next prime is 312042457. The reversal of 312042403 is 304240213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304240213 = 41 ⋅7420493.

It is a cyclic number.

It is not a de Polignac number, because 312042403 - 2¹³ = 312034211 is a prime.

It is a super-2 number, since 2×312042403² = 194740922540028818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312042503) 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, 6783508 + ... + 6783553.

It is an arithmetic number, because the mean of its divisors is an integer number (81402372).

Almost surely, 2^312042403 is an apocalyptic number.

312042403 is a deficient number, since it is larger than the sum of its proper divisors (13567085).

312042403 is a wasteful number, since it uses less digits than its factorization.

312042403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13567084.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 312042403 is about 17664.7219904532. The cubic root of 312042403 is about 678.2730131808.

Adding to 312042403 its reverse (304240213), we get a palindrome (616282616).

It can be divided in two parts, 312042 and 403, that added together give a triangular number (312445 = T₇₉₀).

The spelling of 312042403 in words is "three hundred twelve million, forty-two thousand, four hundred three".