3155113421 has 2 divisors, whose sum is σ = 3155113422. Its totient is φ = 3155113420.

The previous prime is 3155113417. The next prime is 3155113459. The reversal of 3155113421 is 1243115513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3155068900 + 44521 = 56170^2 + 211^2 .

It is a cyclic number.

It is not a de Polignac number, because 3155113421 - 2² = 3155113417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3155113721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1577556710 + 1577556711.

It is an arithmetic number, because the mean of its divisors is an integer number (1577556711).

Almost surely, 2^3155113421 is an apocalyptic number.

It is an amenable number.

3155113421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3155113421 is an equidigital number, since it uses as much as digits as its factorization.

3155113421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 26.

The square root of 3155113421 is about 56170.3963044592. The cubic root of 3155113421 is about 1466.6899810745.

Adding to 3155113421 its reverse (1243115513), we get a palindrome (4398228934).

The spelling of 3155113421 in words is "three billion, one hundred fifty-five million, one hundred thirteen thousand, four hundred twenty-one".