75515161 has 2 divisors, whose sum is σ = 75515162. Its totient is φ = 75515160.

The previous prime is 75515119. The next prime is 75515189. The reversal of 75515161 is 16151557.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67568400 + 7946761 = 8220^2 + 2819^2 .

It is a cyclic number.

It is not a de Polignac number, because 75515161 - 2¹⁹ = 74990873 is a prime.

It is not a weakly prime, because it can be changed into another prime (75512161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37757580 + 37757581.

It is an arithmetic number, because the mean of its divisors is an integer number (37757581).

Almost surely, 2^75515161 is an apocalyptic number.

It is an amenable number.

75515161 is a deficient number, since it is larger than the sum of its proper divisors (1).

75515161 is an equidigital number, since it uses as much as digits as its factorization.

75515161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5250, while the sum is 31.

The square root of 75515161 is about 8689.9459722141. The cubic root of 75515161 is about 422.6796938796.

The spelling of 75515161 in words is "seventy-five million, five hundred fifteen thousand, one hundred sixty-one".