100881031 has 2 divisors, whose sum is σ = 100881032. Its totient is φ = 100881030.

The previous prime is 100881023. The next prime is 100881041. The reversal of 100881031 is 130188001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100881031 - 2³ = 100881023 is a prime.

It is a super-2 number, since 2×100881031² = 20353964831245922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100880993 and 100881011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100881041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50440515 + 50440516.

It is an arithmetic number, because the mean of its divisors is an integer number (50440516).

Almost surely, 2^100881031 is an apocalyptic number.

100881031 is a deficient number, since it is larger than the sum of its proper divisors (1).

100881031 is an equidigital number, since it uses as much as digits as its factorization.

100881031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 100881031 is about 10043.9549481268. The cubic root of 100881031 is about 465.5180275318.

The spelling of 100881031 in words is "one hundred million, eight hundred eighty-one thousand, thirty-one".