101528865 has 12 divisors (see below), whose sum is σ = 175983444. Its totient is φ = 54148704.

The previous prime is 101528839. The next prime is 101528881. The reversal of 101528865 is 568825101.

It can be written as a sum of positive squares in 2 ways, for example, as 63632529 + 37896336 = 7977^2 + 6156^2 .

It is not a de Polignac number, because 101528865 - 2¹⁸ = 101266721 is a prime.

It is a super-2 number, since 2×101528865² = 20616220856376450, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1128054 + ... + 1128143.

It is an arithmetic number, because the mean of its divisors is an integer number (14665287).

Almost surely, 2^101528865 is an apocalyptic number.

101528865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

101528865 is a deficient number, since it is larger than the sum of its proper divisors (74454579).

101528865 is a wasteful number, since it uses less digits than its factorization.

101528865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256208 (or 2256205 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The square root of 101528865 is about 10076.1532838678. The cubic root of 101528865 is about 466.5123840897.

The spelling of 101528865 in words is "one hundred one million, five hundred twenty-eight thousand, eight hundred sixty-five".