1011685531 has 2 divisors, whose sum is σ = 1011685532. Its totient is φ = 1011685530.

The previous prime is 1011685523. The next prime is 1011685573. The reversal of 1011685531 is 1355861101.

1011685531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1011685531 - 2³ = 1011685523 is a prime.

It is a super-2 number, since 2×1011685531² = 2047015227269503922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1011685493 and 1011685502.

It is not a weakly prime, because it can be changed into another prime (1011655531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505842765 + 505842766.

It is an arithmetic number, because the mean of its divisors is an integer number (505842766).

Almost surely, 2^1011685531 is an apocalyptic number.

1011685531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011685531 is an equidigital number, since it uses as much as digits as its factorization.

1011685531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 1011685531 is about 31807.0044329861. The cubic root of 1011685531 is about 1003.8801023340.

The spelling of 1011685531 in words is "one billion, eleven million, six hundred eighty-five thousand, five hundred thirty-one".