211139425 has 24 divisors (see below), whose sum is σ = 312230016. Its totient is φ = 138483840.

The previous prime is 211139387. The next prime is 211139447. The reversal of 211139425 is 524931112.

It is a de Polignac number, because none of the positive numbers 2^k-211139425 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211139393 and 211139402.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22204 + ... + 30253.

It is an arithmetic number, because the mean of its divisors is an integer number (13009584).

Almost surely, 2^211139425 is an apocalyptic number.

211139425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

211139425 is a deficient number, since it is larger than the sum of its proper divisors (101090591).

211139425 is a wasteful number, since it uses less digits than its factorization.

211139425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52497 (or 52492 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 211139425 is about 14530.6374602080. The cubic root of 211139425 is about 595.4652811438.

The spelling of 211139425 in words is "two hundred eleven million, one hundred thirty-nine thousand, four hundred twenty-five".