212140525 has 12 divisors (see below), whose sum is σ = 263236500. Its totient is φ = 169594880.

The previous prime is 212140451. The next prime is 212140531. The reversal of 212140525 is 525041212.

212140525 = 2901² + 2902² + ... + 2925².

It can be written as a sum of positive squares in 6 ways, for example, as 670761 + 211469764 = 819^2 + 14542^2 .

It is not a de Polignac number, because 212140525 - 2⁹ = 212140013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212140496 and 212140505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62061 + ... + 65389.

It is an arithmetic number, because the mean of its divisors is an integer number (21936375).

Almost surely, 2^212140525 is an apocalyptic number.

212140525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212140525 is a deficient number, since it is larger than the sum of its proper divisors (51095975).

212140525 is a wasteful number, since it uses less digits than its factorization.

212140525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5888 (or 5883 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 212140525 is about 14565.0446274634. The cubic root of 212140525 is about 596.4049139880.

Adding to 212140525 its reverse (525041212), we get a palindrome (737181737).

The spelling of 212140525 in words is "two hundred twelve million, one hundred forty thousand, five hundred twenty-five".