311645042 has 4 divisors (see below), whose sum is σ = 467467566. Its totient is φ = 155822520.

The previous prime is 311645027. The next prime is 311645051. The reversal of 311645042 is 240546113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240546113 = 367 ⋅655439.

It can be written as a sum of positive squares in only one way, i.e., 294843241 + 16801801 = 17171^2 + 4099^2 .

It is a super-3 number, since 3×311645042³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77911259 + ... + 77911262.

Almost surely, 2^311645042 is an apocalyptic number.

311645042 is a deficient number, since it is larger than the sum of its proper divisors (155822524).

311645042 is a wasteful number, since it uses less digits than its factorization.

311645042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155822523.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 311645042 is about 17653.4711034403. The cubic root of 311645042 is about 677.9849821046.

The spelling of 311645042 in words is "three hundred eleven million, six hundred forty-five thousand, forty-two".