311661311422 has 4 divisors (see below), whose sum is σ = 467491967136. Its totient is φ = 155830655710.

The previous prime is 311661311393. The next prime is 311661311443. The reversal of 311661311422 is 224113166113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 224113166113 = 48527 ⋅4618319.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77915327854 + ... + 77915327857.

It is an arithmetic number, because the mean of its divisors is an integer number (116872991784).

Almost surely, 2^311661311422 is an apocalyptic number.

311661311422 is a deficient number, since it is larger than the sum of its proper divisors (155830655714).

311661311422 is a wasteful number, since it uses less digits than its factorization.

311661311422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155830655713.

The product of its digits is 5184, while the sum is 31.

Adding to 311661311422 its reverse (224113166113), we get a palindrome (535774477535).

The spelling of 311661311422 in words is "three hundred eleven billion, six hundred sixty-one million, three hundred eleven thousand, four hundred twenty-two".