312303122 has 4 divisors (see below), whose sum is σ = 468454686. Its totient is φ = 156151560.

The previous prime is 312303113. The next prime is 312303137. The reversal of 312303122 is 221303213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221303213 = 47 ⋅4708579.

It can be written as a sum of positive squares in only one way, i.e., 312193561 + 109561 = 17669^2 + 331^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 312303122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78075779 + ... + 78075782.

Almost surely, 2^312303122 is an apocalyptic number.

312303122 is a deficient number, since it is larger than the sum of its proper divisors (156151564).

312303122 is a wasteful number, since it uses less digits than its factorization.

312303122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156151563.

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

The square root of 312303122 is about 17672.1001015725. The cubic root of 312303122 is about 678.4618651145.

Adding to 312303122 its reverse (221303213), we get a palindrome (533606335).

Subtracting from 312303122 its reverse (221303213), we obtain a palindrome (90999909).

The spelling of 312303122 in words is "three hundred twelve million, three hundred three thousand, one hundred twenty-two".