840103531 has 2 divisors, whose sum is σ = 840103532. Its totient is φ = 840103530.

The previous prime is 840103483. The next prime is 840103567. The reversal of 840103531 is 135301048.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 840103531 - 2¹⁹ = 839579243 is a prime.

It is a super-2 number, since 2×840103531² = 1411547885597335922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 840103496 and 840103505.

It is not a weakly prime, because it can be changed into another prime (840107531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420051765 + 420051766.

It is an arithmetic number, because the mean of its divisors is an integer number (420051766).

Almost surely, 2^840103531 is an apocalyptic number.

840103531 is a deficient number, since it is larger than the sum of its proper divisors (1).

840103531 is an equidigital number, since it uses as much as digits as its factorization.

840103531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 840103531 is about 28984.5395167838. The cubic root of 840103531 is about 943.5775585641.

Adding to 840103531 its reverse (135301048), we get a palindrome (975404579).

The spelling of 840103531 in words is "eight hundred forty million, one hundred three thousand, five hundred thirty-one".