2153943 has 12 divisors (see below), whose sum is σ = 3394248. Its totient is φ = 1305360.

The previous prime is 2153939. The next prime is 2153953. The reversal of 2153943 is 3493512.

It is not a de Polignac number, because 2153943 - 2² = 2153939 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

2153943 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10780 + ... + 10977.

It is an arithmetic number, because the mean of its divisors is an integer number (282854).

2^2153943 is an apocalyptic number.

2153943 is a deficient number, since it is larger than the sum of its proper divisors (1240305).

2153943 is a wasteful number, since it uses less digits than its factorization.

2153943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21774 (or 21771 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 2153943 is about 1467.6317658050. The cubic root of 2153943 is about 129.1451404063.

The spelling of 2153943 in words is "two million, one hundred fifty-three thousand, nine hundred forty-three".