212731667125 has 16 divisors (see below), whose sum is σ = 267838599600. Its totient is φ = 168679257600.

The previous prime is 212731667123. The next prime is 212731667189. The reversal of 212731667125 is 521766137212.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 71865814084 + 140865853041 = 268078^2 + 375321^2 .

It is not a de Polignac number, because 212731667125 - 2¹ = 212731667123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212731667123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7516200 + ... + 7544449.

It is an arithmetic number, because the mean of its divisors is an integer number (16739912475).

Almost surely, 2^212731667125 is an apocalyptic number.

212731667125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212731667125 is a deficient number, since it is larger than the sum of its proper divisors (55106932475).

212731667125 is a wasteful number, since it uses less digits than its factorization.

212731667125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15060777 (or 15060767 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The spelling of 212731667125 in words is "two hundred twelve billion, seven hundred thirty-one million, six hundred sixty-seven thousand, one hundred twenty-five".