2111161537 has 2 divisors, whose sum is σ = 2111161538. Its totient is φ = 2111161536.

The previous prime is 2111161511. The next prime is 2111161543. The reversal of 2111161537 is 7351611112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1368926001 + 742235536 = 36999^2 + 27244^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111161537 - 2¹⁵ = 2111128769 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111161037) 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, 1055580768 + 1055580769.

It is an arithmetic number, because the mean of its divisors is an integer number (1055580769).

Almost surely, 2^2111161537 is an apocalyptic number.

It is an amenable number.

2111161537 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111161537 is an equidigital number, since it uses as much as digits as its factorization.

2111161537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 28.

The square root of 2111161537 is about 45947.3779121290. The cubic root of 2111161537 is about 1282.8439242438.

Adding to 2111161537 its reverse (7351611112), we get a palindrome (9462772649).

The spelling of 2111161537 in words is "two billion, one hundred eleven million, one hundred sixty-one thousand, five hundred thirty-seven".