312211302023440 has 80 divisors (see below), whose sum is σ = 731559831924096. Its totient is φ = 123911835264000.

The previous prime is 312211302023389. The next prime is 312211302023473. The reversal of 312211302023440 is 44320203112213.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×312211302023440² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 312211302023399 and 312211302023408.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12081916 + ... + 27755995.

Almost surely, 2^{312211302023440} is an apocalyptic number.

It is an amenable number.

312211302023440 is an abundant number, since it is smaller than the sum of its proper divisors (419348529900656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312211302023440 is a wasteful number, since it uses less digits than its factorization.

312211302023440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39838688 (or 39838682 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 312211302023440 its reverse (44320203112213), we get a palindrome (356531505135653).

The spelling of 312211302023440 in words is "three hundred twelve trillion, two hundred eleven billion, three hundred two million, twenty-three thousand, four hundred forty".