21050241525 has 120 divisors (see below), whose sum is σ = 40517281728. Its totient is φ = 10795680000.

The previous prime is 21050241497. The next prime is 21050241559. The reversal of 21050241525 is 52514205012.

21050241525 is a `hidden beast` number, since 2 + 1 + 0 + 502 + 4 + 152 + 5 = 666.

It is not a de Polignac number, because 21050241525 - 2⁸ = 21050241269 is a prime.

It is a super-2 number, since 2×21050241525² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

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 119 ways as a sum of consecutive naturals, for example, 5892990 + ... + 5896560.

Almost surely, 2^21050241525 is an apocalyptic number.

21050241525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21050241525 is a deficient number, since it is larger than the sum of its proper divisors (19467040203).

21050241525 is a wasteful number, since it uses less digits than its factorization.

21050241525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3705 (or 3691 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 21050241525 its reverse (52514205012), we get a palindrome (73564446537).

The spelling of 21050241525 in words is "twenty-one billion, fifty million, two hundred forty-one thousand, five hundred twenty-five".