212312403 has 36 divisors (see below), whose sum is σ = 327373488. Its totient is φ = 132559200.

The previous prime is 212312369. The next prime is 212312411. The reversal of 212312403 is 304213212.

212312403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212312403 - 2¹⁷ = 212181331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212312413) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 327826 + ... + 328472.

It is an arithmetic number, because the mean of its divisors is an integer number (9093708).

Almost surely, 2^212312403 is an apocalyptic number.

212312403 is a deficient number, since it is larger than the sum of its proper divisors (115061085).

212312403 is a wasteful number, since it uses less digits than its factorization.

212312403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792 (or 770 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 212312403 is about 14570.9437923561. The cubic root of 212312403 is about 596.5659412312.

Adding to 212312403 its reverse (304213212), we get a palindrome (516525615).

The spelling of 212312403 in words is "two hundred twelve million, three hundred twelve thousand, four hundred three".