10521331 has 2 divisors, whose sum is σ = 10521332. Its totient is φ = 10521330.

The previous prime is 10521311. The next prime is 10521359. The reversal of 10521331 is 13312501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10521331 - 2¹⁵ = 10488563 is a prime.

It is a super-2 number, since 2×10521331² = 221396812023122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10521311) 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 as a sum of consecutive naturals, namely, 5260665 + 5260666.

It is an arithmetic number, because the mean of its divisors is an integer number (5260666).

Almost surely, 2^10521331 is an apocalyptic number.

10521331 is a deficient number, since it is larger than the sum of its proper divisors (1).

10521331 is an equidigital number, since it uses as much as digits as its factorization.

10521331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 10521331 is about 3243.6601239957. The cubic root of 10521331 is about 219.1241416495.

Adding to 10521331 its reverse (13312501), we get a palindrome (23833832).

The spelling of 10521331 in words is "ten million, five hundred twenty-one thousand, three hundred thirty-one".