2100431 has 8 divisors (see below), whose sum is σ = 2225280. Its totient is φ = 1977048.

The previous prime is 2100409. The next prime is 2100451. The reversal of 2100431 is 1340012.

It is a happy number.

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-2100431 is a prime.

It is a super-2 number, since 2×2100431² = 8823620771522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100451) 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, 4070 + ... + 4556.

It is an arithmetic number, because the mean of its divisors is an integer number (278160).

2^2100431 is an apocalyptic number.

2100431 is a deficient number, since it is larger than the sum of its proper divisors (124849).

2100431 is a wasteful number, since it uses less digits than its factorization.

2100431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2100431 is about 1449.2863761176. The cubic root of 2100431 is about 128.0666766871.

Adding to 2100431 its reverse (1340012), we get a palindrome (3440443).

The spelling of 2100431 in words is "two million, one hundred thousand, four hundred thirty-one".