100032381 has 16 divisors (see below), whose sum is σ = 152977920. Its totient is φ = 64536480.

The previous prime is 100032371. The next prime is 100032389. The reversal of 100032381 is 183230001.

It is not a de Polignac number, because 100032381 - 2²² = 95838077 is a prime.

It is a super-2 number, since 2×100032381² = 20012954497058322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100032389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58920 + ... + 60593.

It is an arithmetic number, because the mean of its divisors is an integer number (9561120).

Almost surely, 2^100032381 is an apocalyptic number.

It is an amenable number.

100032381 is a deficient number, since it is larger than the sum of its proper divisors (52945539).

100032381 is a wasteful number, since it uses less digits than its factorization.

100032381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119553 (or 119547 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 100032381 is about 10001.6189189551. The cubic root of 100032381 is about 464.2089777173.

Adding to 100032381 its reverse (183230001), we get a palindrome (283262382).

The spelling of 100032381 in words is "one hundred million, thirty-two thousand, three hundred eighty-one".