312203123 has 4 divisors (see below), whose sum is σ = 312244920. Its totient is φ = 312161328.

The previous prime is 312203119. The next prime is 312203137. The reversal of 312203123 is 321302213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321302213 = 83 ⋅3871111.

It is a cyclic number.

It is not a de Polignac number, because 312203123 - 2² = 312203119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312203323) 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, 6290 + ... + 25767.

It is an arithmetic number, because the mean of its divisors is an integer number (78061230).

Almost surely, 2^312203123 is an apocalyptic number.

312203123 is a deficient number, since it is larger than the sum of its proper divisors (41797).

312203123 is an equidigital number, since it uses as much as digits as its factorization.

312203123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41796.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 312203123 is about 17669.2705848317. The cubic root of 312203123 is about 678.3894432206.

Adding to 312203123 its reverse (321302213), we get a palindrome (633505336).

It can be divided in two parts, 31220 and 3123, that added together give a palindrome (34343).

The spelling of 312203123 in words is "three hundred twelve million, two hundred three thousand, one hundred twenty-three".