101525521 has 4 divisors (see below), whose sum is σ = 104269492. Its totient is φ = 98781552.

The previous prime is 101525509. The next prime is 101525539. The reversal of 101525521 is 125525101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125525101 = 13 ⋅9655777.

It can be written as a sum of positive squares in 2 ways, for example, as 66585600 + 34939921 = 8160^2 + 5911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101525521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101525492 and 101525501.

It is not an unprimeable number, because it can be changed into a prime (101525561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1371930 + ... + 1372003.

It is an arithmetic number, because the mean of its divisors is an integer number (26067373).

Almost surely, 2^101525521 is an apocalyptic number.

It is an amenable number.

101525521 is a deficient number, since it is larger than the sum of its proper divisors (2743971).

101525521 is an equidigital number, since it uses as much as digits as its factorization.

101525521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743970.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 101525521 is about 10075.9873461612. The cubic root of 101525521 is about 466.5072622801.

The spelling of 101525521 in words is "one hundred one million, five hundred twenty-five thousand, five hundred twenty-one".