211420025 has 12 divisors (see below), whose sum is σ = 273559872. Its totient is φ = 161781840.

The previous prime is 211420009. The next prime is 211420043. The reversal of 211420025 is 520024112.

It is not a de Polignac number, because 211420025 - 2⁴ = 211420009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211419985 and 211420012.

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, 183269 + ... + 184418.

It is an arithmetic number, because the mean of its divisors is an integer number (22796656).

Almost surely, 2^211420025 is an apocalyptic number.

211420025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

211420025 is a deficient number, since it is larger than the sum of its proper divisors (62139847).

211420025 is a wasteful number, since it uses less digits than its factorization.

211420025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367720 (or 367715 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 211420025 is about 14540.2897151329. The cubic root of 211420025 is about 595.7289514552.

Adding to 211420025 its reverse (520024112), we get a palindrome (731444137).

The spelling of 211420025 in words is "two hundred eleven million, four hundred twenty thousand, twenty-five".