10519821 has 64 divisors (see below), whose sum is σ = 18627840. Its totient is φ = 5806080.

The previous prime is 10519813. The next prime is 10519843. The reversal of 10519821 is 12891501.

10519821 = 170² + 171² + ... + 331².

It is not a de Polignac number, because 10519821 - 2³ = 10519813 is a prime.

It is a super-2 number, since 2×10519821² = 221333267744082, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10519021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 244626 + ... + 244668.

It is an arithmetic number, because the mean of its divisors is an integer number (291060).

Almost surely, 2^10519821 is an apocalyptic number.

It is an amenable number.

10519821 is a deficient number, since it is larger than the sum of its proper divisors (8108019).

10519821 is a wasteful number, since it uses less digits than its factorization.

10519821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 117 counting only the distinct ones).

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

The square root of 10519821 is about 3243.4273538959. The cubic root of 10519821 is about 219.1136583978.

The spelling of 10519821 in words is "ten million, five hundred nineteen thousand, eight hundred twenty-one".