2151212 has 12 divisors (see below), whose sum is σ = 4302480. Its totient is φ = 921936.

The previous prime is 2151211. The next prime is 2151221. The reversal of 2151212 is 2121512.

2151212 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (2151211) 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, 38387 + ... + 38442.

It is an arithmetic number, because the mean of its divisors is an integer number (358540).

2^2151212 is an apocalyptic number.

It is an amenable number.

2151212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2151212 is a wasteful number, since it uses less digits than its factorization.

2151212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76840 (or 76838 counting only the distinct ones).

The product of its digits is 40, while the sum is 14.

The square root of 2151212 is about 1466.7010602028. The cubic root of 2151212 is about 129.0905359676.

Adding to 2151212 its reverse (2121512), we get a palindrome (4272724).

The spelling of 2151212 in words is "two million, one hundred fifty-one thousand, two hundred twelve".