2131115401 has 2 divisors, whose sum is σ = 2131115402. Its totient is φ = 2131115400.

The previous prime is 2131115377. The next prime is 2131115417. The reversal of 2131115401 is 1045111312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2004890176 + 126225225 = 44776^2 + 11235^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131115401 - 2¹⁵ = 2131082633 is a prime.

It is not a weakly prime, because it can be changed into another prime (2131116401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065557700 + 1065557701.

It is an arithmetic number, because the mean of its divisors is an integer number (1065557701).

Almost surely, 2^2131115401 is an apocalyptic number.

It is an amenable number.

2131115401 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131115401 is an equidigital number, since it uses as much as digits as its factorization.

2131115401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 2131115401 is about 46164.0054696297. The cubic root of 2131115401 is about 1286.8729018376.

Adding to 2131115401 its reverse (1045111312), we get a palindrome (3176226713).

The spelling of 2131115401 in words is "two billion, one hundred thirty-one million, one hundred fifteen thousand, four hundred one".