213192305 has 4 divisors (see below), whose sum is σ = 255830772. Its totient is φ = 170553840.

The previous prime is 213192281. The next prime is 213192319. The reversal of 213192305 is 503291312.

213192305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 73290721 + 139901584 = 8561^2 + 11828^2 .

It is not a de Polignac number, because 213192305 - 2¹⁸ = 212930161 is a prime.

It is a super-2 number, since 2×213192305² = 90901917822426050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21319226 + ... + 21319235.

It is an arithmetic number, because the mean of its divisors is an integer number (63957693).

Almost surely, 2^213192305 is an apocalyptic number.

It is an amenable number.

213192305 is a deficient number, since it is larger than the sum of its proper divisors (42638467).

213192305 is an equidigital number, since it uses as much as digits as its factorization.

213192305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42638466.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 213192305 is about 14601.1062937025. The cubic root of 213192305 is about 597.3889361326.

The spelling of 213192305 in words is "two hundred thirteen million, one hundred ninety-two thousand, three hundred five".