2157910 has 16 divisors (see below), whose sum is σ = 4010112. Its totient is φ = 835200.

The previous prime is 2157907. The next prime is 2157913. The reversal of 2157910 is 197512.

2157910 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2157907) and next prime (2157913).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157913) 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, 3171 + ... + 3790.

It is an arithmetic number, because the mean of its divisors is an integer number (250632).

2^2157910 is an apocalyptic number.

2157910 is a deficient number, since it is larger than the sum of its proper divisors (1852202).

2157910 is a wasteful number, since it uses less digits than its factorization.

2157910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6999.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 2157910 is about 1468.9826411500. The cubic root of 2157910 is about 129.2243756467.

The spelling of 2157910 in words is "two million, one hundred fifty-seven thousand, nine hundred ten".