311661422 has 4 divisors (see below), whose sum is σ = 467492136. Its totient is φ = 155830710.

The previous prime is 311661407. The next prime is 311661439. The reversal of 311661422 is 224166113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 224166113 = 137 ⋅1636249.

It is a junction number, because it is equal to n+sod(n) for n = 311661391 and 311661400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77915354 + ... + 77915357.

It is an arithmetic number, because the mean of its divisors is an integer number (116873034).

Almost surely, 2^311661422 is an apocalyptic number.

311661422 is a deficient number, since it is larger than the sum of its proper divisors (155830714).

311661422 is a wasteful number, since it uses less digits than its factorization.

311661422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155830713.

The product of its digits is 1728, while the sum is 26.

The square root of 311661422 is about 17653.9350287691. The cubic root of 311661422 is about 677.9968601474.

The spelling of 311661422 in words is "three hundred eleven million, six hundred sixty-one thousand, four hundred twenty-two".