212557125 has 48 divisors (see below), whose sum is σ = 387556416. Its totient is φ = 102604000.

The previous prime is 212557067. The next prime is 212557129. The reversal of 212557125 is 521755212.

212557125 = 1416² + 1417² + ... + 1514².

It is not a de Polignac number, because 212557125 - 2⁶ = 212557061 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212557092 and 212557101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212557129) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 936262 + ... + 936488.

It is an arithmetic number, because the mean of its divisors is an integer number (8074092).

Almost surely, 2^212557125 is an apocalyptic number.

212557125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212557125 is a deficient number, since it is larger than the sum of its proper divisors (174999291).

212557125 is an equidigital number, since it uses as much as digits as its factorization.

212557125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483 (or 246 counting only the distinct ones).

The product of its digits is 7000, while the sum is 30.

The square root of 212557125 is about 14579.3389767849. The cubic root of 212557125 is about 596.7950639001.

The spelling of 212557125 in words is "two hundred twelve million, five hundred fifty-seven thousand, one hundred twenty-five".