212125715 has 16 divisors (see below), whose sum is σ = 265731840. Its totient is φ = 162370560.

The previous prime is 212125703. The next prime is 212125717. The reversal of 212125715 is 517521212.

It is not a de Polignac number, because 212125715 - 2¹⁶ = 212060179 is a prime.

It is a super-2 number, since 2×212125715² = 89994637928522450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212125717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6107 + ... + 21483.

It is an arithmetic number, because the mean of its divisors is an integer number (16608240).

Almost surely, 2^212125715 is an apocalyptic number.

212125715 is a deficient number, since it is larger than the sum of its proper divisors (53606125).

212125715 is a wasteful number, since it uses less digits than its factorization.

212125715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15502.

The product of its digits is 1400, while the sum is 26.

The square root of 212125715 is about 14564.5362095743. The cubic root of 212125715 is about 596.3910348823.

Adding to 212125715 its reverse (517521212), we get a palindrome (729646927).

The spelling of 212125715 in words is "two hundred twelve million, one hundred twenty-five thousand, seven hundred fifteen".