10003213520 has 40 divisors (see below), whose sum is σ = 23287858440. Its totient is φ = 3996057600.

The previous prime is 10003213511. The next prime is 10003213523. The reversal of 10003213520 is 2531230001.

It can be written as a sum of positive squares in 4 ways, for example, as 2581046416 + 7422167104 = 50804^2 + 86152^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10003213523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19781 + ... + 142820.

It is an arithmetic number, because the mean of its divisors is an integer number (582196461).

Almost surely, 2^10003213520 is an apocalyptic number.

10003213520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10003213520 is an abundant number, since it is smaller than the sum of its proper divisors (13284644920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10003213520 is a wasteful number, since it uses less digits than its factorization.

10003213520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163383 (or 163377 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

Adding to 10003213520 its reverse (2531230001), we get a palindrome (12534443521).

The spelling of 10003213520 in words is "ten billion, three million, two hundred thirteen thousand, five hundred twenty".