213152405 has 4 divisors (see below), whose sum is σ = 255782892. Its totient is φ = 170521920.

The previous prime is 213152351. The next prime is 213152441. The reversal of 213152405 is 504251312.

213152405 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 159188689 + 53963716 = 12617^2 + 7346^2 .

It is a de Polignac number, because none of the positive numbers 2^k-213152405 is a prime.

It is a Duffinian number.

It is a congruent 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, 21315236 + ... + 21315245.

It is an arithmetic number, because the mean of its divisors is an integer number (63945723).

Almost surely, 2^213152405 is an apocalyptic number.

It is an amenable number.

213152405 is a deficient number, since it is larger than the sum of its proper divisors (42630487).

213152405 is an equidigital number, since it uses as much as digits as its factorization.

213152405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42630486.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 213152405 is about 14599.7398949433. The cubic root of 213152405 is about 597.3516657041.

The spelling of 213152405 in words is "two hundred thirteen million, one hundred fifty-two thousand, four hundred five".