2100531 has 8 divisors (see below), whose sum is σ = 2836480. Its totient is φ = 1382472.

The previous prime is 2100523. The next prime is 2100533. The reversal of 2100531 is 1350012.

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

It is not a de Polignac number, because 2100531 - 2³ = 2100523 is a prime.

It is a super-2 number, since 2×2100531² = 8824460963922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100533) 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, 4195 + ... + 4668.

It is an arithmetic number, because the mean of its divisors is an integer number (354560).

2^2100531 is an apocalyptic number.

2100531 is a deficient number, since it is larger than the sum of its proper divisors (735949).

2100531 is an equidigital number, since it uses as much as digits as its factorization.

2100531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8945.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 2100531 is about 1449.3208754448. The cubic root of 2100531 is about 128.0687090421.

Adding to 2100531 its reverse (1350012), we get a palindrome (3450543).

The spelling of 2100531 in words is "two million, one hundred thousand, five hundred thirty-one".