211230430403 has 4 divisors (see below), whose sum is σ = 212177652288. Its totient is φ = 210283208520.

The previous prime is 211230430399. The next prime is 211230430421. The reversal of 211230430403 is 304034032112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211230430403 - 2² = 211230430399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211230430603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473610608 + ... + 473611053.

It is an arithmetic number, because the mean of its divisors is an integer number (53044413072).

Almost surely, 2^211230430403 is an apocalyptic number.

211230430403 is a deficient number, since it is larger than the sum of its proper divisors (947221885).

211230430403 is an equidigital number, since it uses as much as digits as its factorization.

211230430403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947221884.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 211230430403 its reverse (304034032112), we get a palindrome (515264462515).

The spelling of 211230430403 in words is "two hundred eleven billion, two hundred thirty million, four hundred thirty thousand, four hundred three".