311053143431 has 4 divisors (see below), whose sum is σ = 311073624000. Its totient is φ = 311032662864.

The previous prime is 311053143329. The next prime is 311053143473. The reversal of 311053143431 is 134341350113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134341350113 = 3323 ⋅40427731.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311053143431 is a prime.

It is a super-2 number, since 2×311053143431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311053143394 and 311053143403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311053142431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10217486 + ... + 10247883.

It is an arithmetic number, because the mean of its divisors is an integer number (77768406000).

Almost surely, 2^311053143431 is an apocalyptic number.

311053143431 is a deficient number, since it is larger than the sum of its proper divisors (20480569).

311053143431 is a wasteful number, since it uses less digits than its factorization.

311053143431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20480568.

The product of its (nonzero) digits is 6480, while the sum is 29.

Adding to 311053143431 its reverse (134341350113), we get a palindrome (445394493544).

The spelling of 311053143431 in words is "three hundred eleven billion, fifty-three million, one hundred forty-three thousand, four hundred thirty-one".