7381215161 has 2 divisors, whose sum is σ = 7381215162. Its totient is φ = 7381215160.

The previous prime is 7381215047. The next prime is 7381215173. The reversal of 7381215161 is 1615121837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7236734761 + 144480400 = 85069^2 + 12020^2 .

It is a cyclic number.

It is not a de Polignac number, because 7381215161 - 2¹⁸ = 7380953017 is a prime.

It is not a weakly prime, because it can be changed into another prime (7381214161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3690607580 + 3690607581.

It is an arithmetic number, because the mean of its divisors is an integer number (3690607581).

Almost surely, 2^7381215161 is an apocalyptic number.

It is an amenable number.

7381215161 is a deficient number, since it is larger than the sum of its proper divisors (1).

7381215161 is an equidigital number, since it uses as much as digits as its factorization.

7381215161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 35.

The square root of 7381215161 is about 85913.9986323533. The cubic root of 7381215161 is about 1947.0448476171.

Adding to 7381215161 its reverse (1615121837), we get a palindrome (8996336998).

The spelling of 7381215161 in words is "seven billion, three hundred eighty-one million, two hundred fifteen thousand, one hundred sixty-one".