212153321 has 8 divisors (see below), whose sum is σ = 217404000. Its totient is φ = 206957920.

The previous prime is 212153309. The next prime is 212153327. The reversal of 212153321 is 123351212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212153321 is a prime.

It is a super-2 number, since 2×212153321² = 90018063222658082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212153293 and 212153302.

It is not an unprimeable number, because it can be changed into a prime (212153327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5996 + ... + 21453.

It is an arithmetic number, because the mean of its divisors is an integer number (27175500).

Almost surely, 2^212153321 is an apocalyptic number.

It is an amenable number.

212153321 is a deficient number, since it is larger than the sum of its proper divisors (5250679).

212153321 is a wasteful number, since it uses less digits than its factorization.

212153321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27639.

The product of its digits is 360, while the sum is 20.

The square root of 212153321 is about 14565.4838917216. The cubic root of 212153321 is about 596.4169051651.

The spelling of 212153321 in words is "two hundred twelve million, one hundred fifty-three thousand, three hundred twenty-one".