2131403 has 8 divisors (see below), whose sum is σ = 2203200. Its totient is φ = 2060800.

The previous prime is 2131399. The next prime is 2131417. The reversal of 2131403 is 3041312.

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

It is a cyclic number.

It is not a de Polignac number, because 2131403 - 2² = 2131399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131463) 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, 4523 + ... + 4971.

It is an arithmetic number, because the mean of its divisors is an integer number (275400).

2^2131403 is an apocalyptic number.

2131403 is a deficient number, since it is larger than the sum of its proper divisors (71797).

2131403 is a wasteful number, since it uses less digits than its factorization.

2131403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2131403 is about 1459.9325326877. The cubic root of 2131403 is about 128.6930788068.

Adding to 2131403 its reverse (3041312), we get a palindrome (5172715).

Subtracting 2131403 from its reverse (3041312), we obtain a palindrome (909909).

The spelling of 2131403 in words is "two million, one hundred thirty-one thousand, four hundred three".