31224240231311 has 4 divisors (see below), whose sum is σ = 31224369900000. Its totient is φ = 31224110562624.

The previous prime is 31224240231263. The next prime is 31224240231361. The reversal of 31224240231311 is 11313204242213.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31224240231311 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 (31224240231361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64472471 + ... + 64954968.

It is an arithmetic number, because the mean of its divisors is an integer number (7806092475000).

Almost surely, 2^{31224240231311} is an apocalyptic number.

31224240231311 is a deficient number, since it is larger than the sum of its proper divisors (129668689).

31224240231311 is a wasteful number, since it uses less digits than its factorization.

31224240231311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129668688.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 31224240231311 its reverse (11313204242213), we get a palindrome (42537444473524).

The spelling of 31224240231311 in words is "thirty-one trillion, two hundred twenty-four billion, two hundred forty million, two hundred thirty-one thousand, three hundred eleven".