212015123544 has 48 divisors (see below), whose sum is σ = 616574597400. Its totient is φ = 60575749248.

The previous prime is 212015123479. The next prime is 212015123591. The reversal of 212015123544 is 445321510212.

212015123544 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212015123544² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90141309 + ... + 90143660.

Almost surely, 2^212015123544 is an apocalyptic number.

212015123544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

212015123544 is an abundant number, since it is smaller than the sum of its proper divisors (404559473856).

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

212015123544 is a wasteful number, since it uses less digits than its factorization.

212015123544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180284992 (or 180284981 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 212015123544 its reverse (445321510212), we get a palindrome (657336633756).

The spelling of 212015123544 in words is "two hundred twelve billion, fifteen million, one hundred twenty-three thousand, five hundred forty-four".