212153015 has 4 divisors (see below), whose sum is σ = 254583624. Its totient is φ = 169722408.

The previous prime is 212153003. The next prime is 212153017. The reversal of 212153015 is 510351212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 212153015 - 2¹⁰ = 212151991 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 (212153017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21215297 + ... + 21215306.

It is an arithmetic number, because the mean of its divisors is an integer number (63645906).

Almost surely, 2^212153015 is an apocalyptic number.

212153015 is a deficient number, since it is larger than the sum of its proper divisors (42430609).

212153015 is an equidigital number, since it uses as much as digits as its factorization.

212153015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42430608.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 212153015 is about 14565.4733874323. The cubic root of 212153015 is about 596.4166184171.

The spelling of 212153015 in words is "two hundred twelve million, one hundred fifty-three thousand, fifteen".