2151229 has 8 divisors (see below), whose sum is σ = 2237760. Its totient is φ = 2066400.

The previous prime is 2151221. The next prime is 2151241. The reversal of 2151229 is 9221512.

2151229 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 2151229 - 2³ = 2151221 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 (2151221) 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, 2542 + ... + 3280.

It is an arithmetic number, because the mean of its divisors is an integer number (279720).

2^2151229 is an apocalyptic number.

It is an amenable number.

2151229 is a deficient number, since it is larger than the sum of its proper divisors (86531).

2151229 is an equidigital number, since it uses as much as digits as its factorization.

2151229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851.

The product of its digits is 360, while the sum is 22.

The square root of 2151229 is about 1466.7068555100. The cubic root of 2151229 is about 129.0908760136.

It can be divided in two parts, 215 and 1229, that added together give a square (1444 = 38²).

The spelling of 2151229 in words is "two million, one hundred fifty-one thousand, two hundred twenty-nine".