211166425 has 12 divisors (see below), whose sum is σ = 265536576. Its totient is φ = 166552400.

The previous prime is 211166411. The next prime is 211166453. The reversal of 211166425 is 524661112.

It is a de Polignac number, because none of the positive numbers 2^k-211166425 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211166393 and 211166402.

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, 57709 + ... + 61258.

It is an arithmetic number, because the mean of its divisors is an integer number (22128048).

Almost surely, 2^211166425 is an apocalyptic number.

211166425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

211166425 is a deficient number, since it is larger than the sum of its proper divisors (54370151).

211166425 is a wasteful number, since it uses less digits than its factorization.

211166425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119048 (or 119043 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 211166425 is about 14531.5665019295. The cubic root of 211166425 is about 595.4906622829.

The spelling of 211166425 in words is "two hundred eleven million, one hundred sixty-six thousand, four hundred twenty-five".