2131903 has 8 divisors (see below), whose sum is σ = 2209472. Its totient is φ = 2055456.

The previous prime is 2131867. The next prime is 2131907. The reversal of 2131903 is 3091312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131903 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 (2131907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5626 + ... + 5992.

It is an arithmetic number, because the mean of its divisors is an integer number (276184).

2^2131903 is an apocalyptic number.

2131903 is a deficient number, since it is larger than the sum of its proper divisors (77569).

2131903 is a wasteful number, since it uses less digits than its factorization.

2131903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 2131903 is about 1460.1037634360. The cubic root of 2131903 is about 128.7031412725.

It can be divided in two parts, 213 and 1903, that added together give a square (2116 = 46²).

The spelling of 2131903 in words is "two million, one hundred thirty-one thousand, nine hundred three".