311643540641051 has 16 divisors (see below), whose sum is σ = 315070722570240. Its totient is φ = 308224201041120.

The previous prime is 311643540641039. The next prime is 311643540641063. The reversal of 311643540641051 is 150146045346113.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (311643540641039) and next prime (311643540641063).

It is a cyclic number.

It is not a de Polignac number, because 311643540641051 - 2⁶ = 311643540640987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311643540640993 and 311643540641011.

It is not an unprimeable number, because it can be changed into a prime (311643540641651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 531646346 + ... + 532232208.

It is an arithmetic number, because the mean of its divisors is an integer number (19691920160640).

Almost surely, 2^{311643540641051} is an apocalyptic number.

311643540641051 is a deficient number, since it is larger than the sum of its proper divisors (3427181929189).

311643540641051 is a wasteful number, since it uses less digits than its factorization.

311643540641051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592546.

The product of its (nonzero) digits is 518400, while the sum is 44.

Adding to 311643540641051 its reverse (150146045346113), we get a palindrome (461789585987164).

The spelling of 311643540641051 in words is "three hundred eleven trillion, six hundred forty-three billion, five hundred forty million, six hundred forty-one thousand, fifty-one".