10531021 has 4 divisors (see below), whose sum is σ = 10565632. Its totient is φ = 10496412.

The previous prime is 10531013. The next prime is 10531039. The reversal of 10531021 is 12013501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10531021 - 2³ = 10531013 is a prime.

It is a super-2 number, since 2×10531021² = 221804806604882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10530992 and 10531010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10531061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16845 + ... + 17458.

It is an arithmetic number, because the mean of its divisors is an integer number (2641408).

Almost surely, 2^10531021 is an apocalyptic number.

It is an amenable number.

10531021 is a deficient number, since it is larger than the sum of its proper divisors (34611).

10531021 is an equidigital number, since it uses as much as digits as its factorization.

10531021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34610.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 10531021 is about 3245.1534632433. The cubic root of 10531021 is about 219.1913911075.

Adding to 10531021 its reverse (12013501), we get a palindrome (22544522).

The spelling of 10531021 in words is "ten million, five hundred thirty-one thousand, twenty-one".