2151215 has 8 divisors (see below), whose sum is σ = 2816208. Its totient is φ = 1564480.

The previous prime is 2151211. The next prime is 2151221. The reversal of 2151215 is 5121512.

2151215 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 not a de Polignac number, because 2151215 - 2² = 2151211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2151193 and 2151202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19502 + ... + 19611.

It is an arithmetic number, because the mean of its divisors is an integer number (352026).

2^2151215 is an apocalyptic number.

2151215 is a deficient number, since it is larger than the sum of its proper divisors (664993).

2151215 is a wasteful number, since it uses less digits than its factorization.

2151215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39129.

The product of its digits is 100, while the sum is 17.

The square root of 2151215 is about 1466.7020829057. The cubic root of 2151215 is about 129.0905959759.

Adding to 2151215 its reverse (5121512), we get a palindrome (7272727).

The spelling of 2151215 in words is "two million, one hundred fifty-one thousand, two hundred fifteen".