10531521 has 72 divisors (see below), whose sum is σ = 20913984. Its totient is φ = 5019840.

The previous prime is 10531519. The next prime is 10531523. The reversal of 10531521 is 12513501.

It is an interprime number because it is at equal distance from previous prime (10531519) and next prime (10531523).

It is not a de Polignac number, because 10531521 - 2¹ = 10531519 is a prime.

It is a super-2 number, since 2×10531521² = 221825869146882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10531494 and 10531503.

It is not an unprimeable number, because it can be changed into a prime (10531523) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 62980 + ... + 63146.

It is an arithmetic number, because the mean of its divisors is an integer number (290472).

Almost surely, 2^10531521 is an apocalyptic number.

10531521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10531521 is a deficient number, since it is larger than the sum of its proper divisors (10382463).

10531521 is a wasteful number, since it uses less digits than its factorization.

10531521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 10531521 is about 3245.2305002881. The cubic root of 10531521 is about 219.1948600323.

It can be divided in two parts, 1053 and 1521, that multiplied together give a cube (1601613 = 117³).

The spelling of 10531521 in words is "ten million, five hundred thirty-one thousand, five hundred twenty-one".