213153815 has 8 divisors (see below), whose sum is σ = 292325280. Its totient is φ = 146162592.

The previous prime is 213153763. The next prime is 213153827. The reversal of 213153815 is 518351312.

It is a happy number.

213153815 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 213153815 - 2¹⁰ = 213152791 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3045020 + ... + 3045089.

It is an arithmetic number, because the mean of its divisors is an integer number (36540660).

Almost surely, 2^213153815 is an apocalyptic number.

213153815 is a deficient number, since it is larger than the sum of its proper divisors (79171465).

213153815 is an equidigital number, since it uses as much as digits as its factorization.

213153815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6090121.

The product of its digits is 3600, while the sum is 29.

The square root of 213153815 is about 14599.7881833950. The cubic root of 213153815 is about 597.3529828586.

The spelling of 213153815 in words is "two hundred thirteen million, one hundred fifty-three thousand, eight hundred fifteen".