311223452143013 has 16 divisors (see below), whose sum is σ = 313106026221360. Its totient is φ = 309346783789056.

The previous prime is 311223452142917. The next prime is 311223452143081. The reversal of 311223452143013 is 310341254322113.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 40292444702689 + 270931007440324 = 6347633^2 + 16459982^2 .

It is a cyclic number.

It is not a de Polignac number, because 311223452143013 - 2⁴² = 306825405631909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311223452193013) 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, 227398295 + ... + 228762827.

It is an arithmetic number, because the mean of its divisors is an integer number (19569126638835).

Almost surely, 2^{311223452143013} is an apocalyptic number.

It is an amenable number.

311223452143013 is a deficient number, since it is larger than the sum of its proper divisors (1882574078347).

311223452143013 is a wasteful number, since it uses less digits than its factorization.

311223452143013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366696.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 311223452143013 in words is "three hundred eleven trillion, two hundred twenty-three billion, four hundred fifty-two million, one hundred forty-three thousand, thirteen".