10521819 has 60 divisors (see below), whose sum is σ = 20028888. Its totient is φ = 5443200.

The previous prime is 10521779. The next prime is 10521821. The reversal of 10521819 is 91812501.

It is not a de Polignac number, because 10521819 - 2¹¹ = 10519771 is a prime.

It is a super-2 number, since 2×10521819² = 221417350137522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 10521792 and 10521801.

It is not an unprimeable number, because it can be changed into a prime (10521859) 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 59 ways as a sum of consecutive naturals, for example, 43539 + ... + 43779.

Almost surely, 2^10521819 is an apocalyptic number.

10521819 is a deficient number, since it is larger than the sum of its proper divisors (9507069).

10521819 is a wasteful number, since it uses less digits than its factorization.

10521819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 262 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 10521819 is about 3243.7353467877. The cubic root of 10521819 is about 219.1275293999.

The spelling of 10521819 in words is "ten million, five hundred twenty-one thousand, eight hundred nineteen".