2151829 has 4 divisors (see below), whose sum is σ = 2226060. Its totient is φ = 2077600.

The previous prime is 2151827. The next prime is 2151847. The reversal of 2151829 is 9281512.

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

It can be written as a sum of positive squares in 2 ways, for example, as 656100 + 1495729 = 810^2 + 1223^2 .

It is a cyclic number.

It is not a de Polignac number, because 2151829 - 2¹ = 2151827 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2151797 and 2151806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151827) 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, 37072 + ... + 37129.

It is an arithmetic number, because the mean of its divisors is an integer number (556515).

2^2151829 is an apocalyptic number.

2151829 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2151829 is a deficient number, since it is larger than the sum of its proper divisors (74231).

2151829 is an equidigital number, since it uses as much as digits as its factorization.

2151829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74230.

The product of its digits is 1440, while the sum is 28.

The square root of 2151829 is about 1466.9113810998. The cubic root of 2151829 is about 129.1028764912.

The spelling of 2151829 in words is "two million, one hundred fifty-one thousand, eight hundred twenty-nine".