531161849 has 2 divisors, whose sum is σ = 531161850. Its totient is φ = 531161848.

The previous prime is 531161801. The next prime is 531161857. The reversal of 531161849 is 948161135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 322561600 + 208600249 = 17960^2 + 14443^2 .

It is a cyclic number.

It is not a de Polignac number, because 531161849 - 2²⁸ = 262726393 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (531161749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265580924 + 265580925.

It is an arithmetic number, because the mean of its divisors is an integer number (265580925).

Almost surely, 2^531161849 is an apocalyptic number.

It is an amenable number.

531161849 is a deficient number, since it is larger than the sum of its proper divisors (1).

531161849 is an equidigital number, since it uses as much as digits as its factorization.

531161849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 38.

The square root of 531161849 is about 23046.9488002208. The cubic root of 531161849 is about 809.8581517599.

The spelling of 531161849 in words is "five hundred thirty-one million, one hundred sixty-one thousand, eight hundred forty-nine".