312198442 has 4 divisors (see below), whose sum is σ = 468297666. Its totient is φ = 156099220.

The previous prime is 312198433. The next prime is 312198451. The reversal of 312198442 is 244891213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244891213 = 7 ⋅34984459.

It is an interprime number because it is at equal distance from previous prime (312198433) and next prime (312198451).

It can be written as a sum of positive squares in only one way, i.e., 180660481 + 131537961 = 13441^2 + 11469^2 .

It is a junction number, because it is equal to n+sod(n) for n = 312198398 and 312198407.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78049609 + ... + 78049612.

Almost surely, 2^312198442 is an apocalyptic number.

312198442 is a deficient number, since it is larger than the sum of its proper divisors (156099224).

312198442 is a wasteful number, since it uses less digits than its factorization.

312198442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156099223.

The product of its digits is 13824, while the sum is 34.

The square root of 312198442 is about 17669.1381227269. The cubic root of 312198442 is about 678.3860527390.

The spelling of 312198442 in words is "three hundred twelve million, one hundred ninety-eight thousand, four hundred forty-two".