2152723 has 4 divisors (see below), whose sum is σ = 2169288. Its totient is φ = 2136160.

The previous prime is 2152691. The next prime is 2152729. The reversal of 2152723 is 3272512.

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

It is a cyclic number.

It is not a de Polignac number, because 2152723 - 2⁵ = 2152691 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 2152694 and 2152703.

It is not an unprimeable number, because it can be changed into a prime (2152729) 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, 8086 + ... + 8347.

It is an arithmetic number, because the mean of its divisors is an integer number (542322).

2^2152723 is an apocalyptic number.

2152723 is a deficient number, since it is larger than the sum of its proper divisors (16565).

2152723 is a wasteful number, since it uses less digits than its factorization.

2152723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16564.

The product of its digits is 840, while the sum is 22.

The square root of 2152723 is about 1467.2160713406. The cubic root of 2152723 is about 129.1207530652.

It can be divided in two parts, 215272 and 3, that multiplied together give a triangular number (645816 = T₁₁₃₆).

The spelling of 2152723 in words is "two million, one hundred fifty-two thousand, seven hundred twenty-three".