311400433021 has 4 divisors (see below), whose sum is σ = 312500788192. Its totient is φ = 310300077852.

The previous prime is 311400433013. The next prime is 311400433051. The reversal of 311400433021 is 120334004113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 311400433021 - 2³ = 311400433013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311400432983 and 311400433001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311400433051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550177161 + ... + 550177726.

It is an arithmetic number, because the mean of its divisors is an integer number (78125197048).

Almost surely, 2^311400433021 is an apocalyptic number.

It is an amenable number.

311400433021 is a deficient number, since it is larger than the sum of its proper divisors (1100355171).

311400433021 is a wasteful number, since it uses less digits than its factorization.

311400433021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100355170.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 311400433021 its reverse (120334004113), we get a palindrome (431734437134).

The spelling of 311400433021 in words is "three hundred eleven billion, four hundred million, four hundred thirty-three thousand, twenty-one".