21035224015 has 16 divisors (see below), whose sum is σ = 27272554848. Its totient is φ = 15483090816.

The previous prime is 21035224013. The next prime is 21035224043. The reversal of 21035224015 is 51042253012.

It is a cyclic number.

It is not a de Polignac number, because 21035224015 - 2¹ = 21035224013 is a prime.

It is a super-2 number, since 2×21035224015² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21035224013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 507112 + ... + 547021.

It is an arithmetic number, because the mean of its divisors is an integer number (1704534678).

Almost surely, 2^21035224015 is an apocalyptic number.

21035224015 is a deficient number, since it is larger than the sum of its proper divisors (6237330833).

21035224015 is a wasteful number, since it uses less digits than its factorization.

21035224015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054458.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 21035224015 its reverse (51042253012), we get a palindrome (72077477027).

It can be divided in two parts, 210 and 35224015, that added together give a square (35224225 = 5935²).

The spelling of 21035224015 in words is "twenty-one billion, thirty-five million, two hundred twenty-four thousand, fifteen".