100531025 has 24 divisors (see below), whose sum is σ = 143413440. Its totient is φ = 68477760.

The previous prime is 100531009. The next prime is 100531037. The reversal of 100531025 is 520135001.

It is not a de Polignac number, because 100531025 - 2⁴ = 100531009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100530994 and 100531012.

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 23 ways as a sum of consecutive naturals, for example, 25646 + ... + 29304.

It is an arithmetic number, because the mean of its divisors is an integer number (5975560).

Almost surely, 2^100531025 is an apocalyptic number.

It is an amenable number.

100531025 is a deficient number, since it is larger than the sum of its proper divisors (42882415).

100531025 is a wasteful number, since it uses less digits than its factorization.

100531025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3833 (or 3828 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 100531025 is about 10026.5160948357. The cubic root of 100531025 is about 464.9790332397.

Adding to 100531025 its reverse (520135001), we get a palindrome (620666026).

The spelling of 100531025 in words is "one hundred million, five hundred thirty-one thousand, twenty-five".