213420403 has 8 divisors (see below), whose sum is σ = 250501472. Its totient is φ = 177987456.

The previous prime is 213420341. The next prime is 213420413. The reversal of 213420403 is 304024312.

213420403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213420403 - 2¹³ = 213412211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213420413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411750 + ... + 412267.

It is an arithmetic number, because the mean of its divisors is an integer number (31312684).

Almost surely, 2^213420403 is an apocalyptic number.

213420403 is a deficient number, since it is larger than the sum of its proper divisors (37081069).

213420403 is an equidigital number, since it uses as much as digits as its factorization.

213420403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824061.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 213420403 is about 14608.9151890207. The cubic root of 213420403 is about 597.6019123212.

Adding to 213420403 its reverse (304024312), we get a palindrome (517444715).

The spelling of 213420403 in words is "two hundred thirteen million, four hundred twenty thousand, four hundred three".