311998142 has 8 divisors (see below), whose sum is σ = 468210456. Its totient is φ = 155927992.

The previous prime is 311998123. The next prime is 311998157. The reversal of 311998142 is 241899113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×311998142² = 194685681222904328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311998096 and 311998105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29873 + ... + 38940.

It is an arithmetic number, because the mean of its divisors is an integer number (58526307).

Almost surely, 2^311998142 is an apocalyptic number.

311998142 is a deficient number, since it is larger than the sum of its proper divisors (156212314).

311998142 is a wasteful number, since it uses less digits than its factorization.

311998142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71082.

The product of its digits is 15552, while the sum is 38.

The square root of 311998142 is about 17663.4691383092. The cubic root of 311998142 is about 678.2409422602.

The spelling of 311998142 in words is "three hundred eleven million, nine hundred ninety-eight thousand, one hundred forty-two".