211545103 has 12 divisors (see below), whose sum is σ = 268454952. Its totient is φ = 164839920.

The previous prime is 211545091. The next prime is 211545109. The reversal of 211545103 is 301545112.

It is a happy number.

It is not a de Polignac number, because 211545103 - 2²⁵ = 177990671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211545109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 195700 + ... + 196777.

It is an arithmetic number, because the mean of its divisors is an integer number (22371246).

Almost surely, 2^211545103 is an apocalyptic number.

211545103 is a deficient number, since it is larger than the sum of its proper divisors (56909849).

211545103 is a wasteful number, since it uses less digits than its factorization.

211545103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392502 (or 392495 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 211545103 is about 14544.5901626687. The cubic root of 211545103 is about 595.8464078417.

Subtracting 211545103 from its reverse (301545112), we obtain a palindrome (90000009).

The spelling of 211545103 in words is "two hundred eleven million, five hundred forty-five thousand, one hundred three".