212316111545 has 16 divisors (see below), whose sum is σ = 268047350928. Its totient is φ = 161231477760.

The previous prime is 212316111541. The next prime is 212316111547. The reversal of 212316111545 is 545111613212.

212316111545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 2321216041 + 209994895504 = 48179^2 + 458252^2 .

It is not a de Polignac number, because 212316111545 - 2² = 212316111541 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212316111541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13988204 + ... + 14003373.

It is an arithmetic number, because the mean of its divisors is an integer number (16752959433).

Almost surely, 2^212316111545 is an apocalyptic number.

It is an amenable number.

212316111545 is a deficient number, since it is larger than the sum of its proper divisors (55731239383).

212316111545 is a wasteful number, since it uses less digits than its factorization.

212316111545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27991660.

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

Adding to 212316111545 its reverse (545111613212), we get a palindrome (757427724757).

The spelling of 212316111545 in words is "two hundred twelve billion, three hundred sixteen million, one hundred eleven thousand, five hundred forty-five".