31145021531411 has 16 divisors (see below), whose sum is σ = 34100772725664. Its totient is φ = 28330634601984.

The previous prime is 31145021531359. The next prime is 31145021531447. The reversal of 31145021531411 is 11413512054113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31145021531411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31145021531111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257903600 + ... + 258024333.

It is an arithmetic number, because the mean of its divisors is an integer number (2131298295354).

Almost surely, 2^{31145021531411} is an apocalyptic number.

31145021531411 is a deficient number, since it is larger than the sum of its proper divisors (2955751194253).

31145021531411 is a wasteful number, since it uses less digits than its factorization.

31145021531411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515928070.

The product of its (nonzero) digits is 7200, while the sum is 32.

Adding to 31145021531411 its reverse (11413512054113), we get a palindrome (42558533585524).

The spelling of 31145021531411 in words is "thirty-one trillion, one hundred forty-five billion, twenty-one million, five hundred thirty-one thousand, four hundred eleven".