100099431 has 12 divisors (see below), whose sum is σ = 144878760. Its totient is φ = 66598800.

The previous prime is 100099423. The next prime is 100099453. The reversal of 100099431 is 134990001.

It is not a de Polignac number, because 100099431 - 2³ = 100099423 is a prime.

It is a super-2 number, since 2×100099431² = 20039792173047522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100099395 and 100099404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100099481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6345 + ... + 15506.

It is an arithmetic number, because the mean of its divisors is an integer number (12073230).

Almost surely, 2^100099431 is an apocalyptic number.

100099431 is a deficient number, since it is larger than the sum of its proper divisors (44779329).

100099431 is a wasteful number, since it uses less digits than its factorization.

100099431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22366 (or 22363 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 100099431 is about 10004.9703147985. The cubic root of 100099431 is about 464.3126716746.

The spelling of 100099431 in words is "one hundred million, ninety-nine thousand, four hundred thirty-one".