101603881 has 2 divisors, whose sum is σ = 101603882. Its totient is φ = 101603880.

The previous prime is 101603867. The next prime is 101603891. The reversal of 101603881 is 188306101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74978281 + 26625600 = 8659^2 + 5160^2 .

It is a cyclic number.

It is not a de Polignac number, because 101603881 - 2⁷ = 101603753 is a prime.

It is a super-2 number, since 2×101603881² = 20646697268524322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (101603851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50801940 + 50801941.

It is an arithmetic number, because the mean of its divisors is an integer number (50801941).

Almost surely, 2^101603881 is an apocalyptic number.

It is an amenable number.

101603881 is a deficient number, since it is larger than the sum of its proper divisors (1).

101603881 is an equidigital number, since it uses as much as digits as its factorization.

101603881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 101603881 is about 10079.8750488287. The cubic root of 101603881 is about 466.6272521700.

Adding to 101603881 its reverse (188306101), we get a palindrome (289909982).

It can be divided in two parts, 10160 and 3881, that added together give a palindrome (14041).

The spelling of 101603881 in words is "one hundred one million, six hundred three thousand, eight hundred eighty-one".