103831406521 has 2 divisors, whose sum is σ = 103831406522. Its totient is φ = 103831406520.

The previous prime is 103831406509. The next prime is 103831406531. The reversal of 103831406521 is 125604138301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73555406521 + 30276000000 = 271211^2 + 174000^2 .

It is a cyclic number.

It is not a de Polignac number, because 103831406521 - 2¹¹ = 103831404473 is a prime.

It is a super-2 number, since 2×103831406521² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (103831406531) 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 as a sum of consecutive naturals, namely, 51915703260 + 51915703261.

It is an arithmetic number, because the mean of its divisors is an integer number (51915703261).

Almost surely, 2^103831406521 is an apocalyptic number.

It is an amenable number.

103831406521 is a deficient number, since it is larger than the sum of its proper divisors (1).

103831406521 is an equidigital number, since it uses as much as digits as its factorization.

103831406521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 103831406521 in words is "one hundred three billion, eight hundred thirty-one million, four hundred six thousand, five hundred twenty-one".