2100731 has 8 divisors (see below), whose sum is σ = 2196720. Its totient is φ = 2006368.

The previous prime is 2100727. The next prime is 2100733. The reversal of 2100731 is 1370012.

2100731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2100731 - 2² = 2100727 is a prime.

It is a super-2 number, since 2×2100731² = 8826141468722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100733) 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, 2765 + ... + 3441.

It is an arithmetic number, because the mean of its divisors is an integer number (274590).

2^2100731 is an apocalyptic number.

2100731 is a deficient number, since it is larger than the sum of its proper divisors (95989).

2100731 is a wasteful number, since it uses less digits than its factorization.

2100731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 2100731 is about 1449.3898716356. The cubic root of 2100731 is about 128.0727735586.

Adding to 2100731 its reverse (1370012), we get a palindrome (3470743).

The spelling of 2100731 in words is "two million, one hundred thousand, seven hundred thirty-one".