212251403 has 16 divisors (see below), whose sum is σ = 263557056. Its totient is φ = 166440960.

The previous prime is 212251387. The next prime is 212251421. The reversal of 212251403 is 304152212.

212251403 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 212251403 - 2⁴ = 212251387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212251453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38 + ... + 20603.

It is an arithmetic number, because the mean of its divisors is an integer number (16472316).

Almost surely, 2^212251403 is an apocalyptic number.

212251403 is a deficient number, since it is larger than the sum of its proper divisors (51305653).

212251403 is a wasteful number, since it uses less digits than its factorization.

212251403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20774.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 212251403 is about 14568.8504350892. The cubic root of 212251403 is about 596.5088021481.

The spelling of 212251403 in words is "two hundred twelve million, two hundred fifty-one thousand, four hundred three".