212135425544 has 32 divisors (see below), whose sum is σ = 454800415680. Its totient is φ = 90870281664.

The previous prime is 212135425519. The next prime is 212135425549. The reversal of 212135425544 is 445524531212.

It is a junction number, because it is equal to n+sod(n) for n = 212135425498 and 212135425507.

It is not an unprimeable number, because it can be changed into a prime (212135425549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 820907 + ... + 1047930.

It is an arithmetic number, because the mean of its divisors is an integer number (14212512990).

Almost surely, 2^212135425544 is an apocalyptic number.

It is an amenable number.

212135425544 is an abundant number, since it is smaller than the sum of its proper divisors (242664990136).

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

212135425544 is a wasteful number, since it uses less digits than its factorization.

212135425544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870877 (or 1870873 counting only the distinct ones).

The product of its digits is 192000, while the sum is 38.

Adding to 212135425544 its reverse (445524531212), we get a palindrome (657659956756).

The spelling of 212135425544 in words is "two hundred twelve billion, one hundred thirty-five million, four hundred twenty-five thousand, five hundred forty-four".