3161154781 has 2 divisors, whose sum is σ = 3161154782. Its totient is φ = 3161154780.

The previous prime is 3161154757. The next prime is 3161154791. The reversal of 3161154781 is 1874511613.

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., 2543184900 + 617969881 = 50430^2 + 24859^2 .

It is a cyclic number.

It is not a de Polignac number, because 3161154781 - 2²⁵ = 3127600349 is a prime.

It is a super-2 number, since 2×3161154781² = 19985799098878315922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3161154781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3161154791) 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, 1580577390 + 1580577391.

It is an arithmetic number, because the mean of its divisors is an integer number (1580577391).

Almost surely, 2^3161154781 is an apocalyptic number.

It is an amenable number.

3161154781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3161154781 is an equidigital number, since it uses as much as digits as its factorization.

3161154781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 3161154781 is about 56224.1476680616. The cubic root of 3161154781 is about 1467.6255156079.

The spelling of 3161154781 in words is "three billion, one hundred sixty-one million, one hundred fifty-four thousand, seven hundred eighty-one".