211331425 has 12 divisors (see below), whose sum is σ = 268443756. Its totient is φ = 164940800.

The previous prime is 211331413. The next prime is 211331431. The reversal of 211331425 is 524133112.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 17230801 + 194100624 = 4151^2 + 13932^2 .

It is not a de Polignac number, because 211331425 - 2⁷ = 211331297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211331396 and 211331405.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102064 + ... + 104113.

It is an arithmetic number, because the mean of its divisors is an integer number (22370313).

Almost surely, 2^211331425 is an apocalyptic number.

211331425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

211331425 is a deficient number, since it is larger than the sum of its proper divisors (57112331).

211331425 is a wasteful number, since it uses less digits than its factorization.

211331425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206228 (or 206223 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 211331425 is about 14537.2426890384. The cubic root of 211331425 is about 595.6457222532.

Adding to 211331425 its reverse (524133112), we get a palindrome (735464537).

The spelling of 211331425 in words is "two hundred eleven million, three hundred thirty-one thousand, four hundred twenty-five".