213029391 has 4 divisors (see below), whose sum is σ = 284039192. Its totient is φ = 142019592.

The previous prime is 213029359. The next prime is 213029393. The reversal of 213029391 is 193920312.

It is a happy number.

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

It is not a de Polignac number, because 213029391 - 2⁵ = 213029359 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 (213029393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35504896 + ... + 35504901.

It is an arithmetic number, because the mean of its divisors is an integer number (71009798).

Almost surely, 2^213029391 is an apocalyptic number.

213029391 is a deficient number, since it is larger than the sum of its proper divisors (71009801).

213029391 is an equidigital number, since it uses as much as digits as its factorization.

213029391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71009800.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 213029391 is about 14595.5264036622. The cubic root of 213029391 is about 597.2367295416.

The spelling of 213029391 in words is "two hundred thirteen million, twenty-nine thousand, three hundred ninety-one".