211225387 has 2 divisors, whose sum is σ = 211225388. Its totient is φ = 211225386.

The previous prime is 211225327. The next prime is 211225397. The reversal of 211225387 is 783522112.

211225387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211225387 - 2²⁷ = 77007659 is a prime.

It is a super-2 number, since 2×211225387² = 89232328226599538, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211225327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105612693 + 105612694.

It is an arithmetic number, because the mean of its divisors is an integer number (105612694).

Almost surely, 2^211225387 is an apocalyptic number.

211225387 is a deficient number, since it is larger than the sum of its proper divisors (1).

211225387 is an equidigital number, since it uses as much as digits as its factorization.

211225387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 31.

The square root of 211225387 is about 14533.5951161438. The cubic root of 211225387 is about 595.5460815302.

Adding to 211225387 its reverse (783522112), we get a palindrome (994747499).

The spelling of 211225387 in words is "two hundred eleven million, two hundred twenty-five thousand, three hundred eighty-seven".