100555431 has 8 divisors (see below), whose sum is σ = 134440704. Its totient is φ = 66853560.

The previous prime is 100555421. The next prime is 100555439. The reversal of 100555431 is 134555001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100555431 - 2⁷ = 100555303 is a prime.

It is a super-2 number, since 2×100555431² = 20222789407191522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100555439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44565 + ... + 46766.

It is an arithmetic number, because the mean of its divisors is an integer number (16805088).

Almost surely, 2^100555431 is an apocalyptic number.

100555431 is a deficient number, since it is larger than the sum of its proper divisors (33885273).

100555431 is an equidigital number, since it uses as much as digits as its factorization.

100555431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91701.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 100555431 is about 10027.7330937755. The cubic root of 100555431 is about 465.0166579765.

The spelling of 100555431 in words is "one hundred million, five hundred fifty-five thousand, four hundred thirty-one".