100581172 has 12 divisors (see below), whose sum is σ = 176115940. Its totient is φ = 50262336.

The previous prime is 100581161. The next prime is 100581179. The reversal of 100581172 is 271185001.

It can be written as a sum of positive squares in 2 ways, for example, as 37283236 + 63297936 = 6106^2 + 7956^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100581179) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2338 + ... + 14374.

Almost surely, 2^100581172 is an apocalyptic number.

It is an amenable number.

100581172 is a deficient number, since it is larger than the sum of its proper divisors (75534768).

100581172 is a wasteful number, since it uses less digits than its factorization.

100581172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14130 (or 14128 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 100581172 is about 10029.0165021302. The cubic root of 100581172 is about 465.0563341777.

The spelling of 100581172 in words is "one hundred million, five hundred eighty-one thousand, one hundred seventy-two".