100555025 has 6 divisors (see below), whose sum is σ = 124688262. Its totient is φ = 80444000.

The previous prime is 100555009. The next prime is 100555031. The reversal of 100555025 is 520555001.

It can be written as a sum of positive squares in 3 ways, for example, as 29203216 + 71351809 = 5404^2 + 8447^2 .

It is not a de Polignac number, because 100555025 - 2⁴ = 100555009 is a prime.

It is a super-2 number, since 2×100555025² = 20222626105501250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2011076 + ... + 2011125.

It is an arithmetic number, because the mean of its divisors is an integer number (20781377).

Almost surely, 2^100555025 is an apocalyptic number.

It is an amenable number.

100555025 is a deficient number, since it is larger than the sum of its proper divisors (24133237).

100555025 is an equidigital number, since it uses as much as digits as its factorization.

100555025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022211 (or 4022206 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 100555025 is about 10027.7128498975. The cubic root of 100555025 is about 465.0160321292.

It can be divided in two parts, 100 and 555025, that multiplied together give a square (55502500 = 7450²).

The spelling of 100555025 in words is "one hundred million, five hundred fifty-five thousand, twenty-five".