20101525 has 24 divisors (see below), whose sum is σ = 26560800. Its totient is φ = 15048000.

The previous prime is 20101519. The next prime is 20101537. The reversal of 20101525 is 52510102.

It is not a de Polignac number, because 20101525 - 2⁵ = 20101493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20101499 and 20101508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47766 + ... + 48184.

It is an arithmetic number, because the mean of its divisors is an integer number (1106700).

Almost surely, 2^20101525 is an apocalyptic number.

20101525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20101525 is a deficient number, since it is larger than the sum of its proper divisors (6459275).

20101525 is a wasteful number, since it uses less digits than its factorization.

20101525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 544 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 20101525 is about 4483.4724265908. The cubic root of 20101525 is about 271.9002887473.

Adding to 20101525 its reverse (52510102), we get a palindrome (72611627).

The spelling of 20101525 in words is "twenty million, one hundred one thousand, five hundred twenty-five".