100515161 has 2 divisors, whose sum is σ = 100515162. Its totient is φ = 100515160.

The previous prime is 100515157. The next prime is 100515193. The reversal of 100515161 is 161515001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71301136 + 29214025 = 8444^2 + 5405^2 .

It is a cyclic number.

It is not a de Polignac number, because 100515161 - 2² = 100515157 is a prime.

It is not a weakly prime, because it can be changed into another prime (100515661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50257580 + 50257581.

It is an arithmetic number, because the mean of its divisors is an integer number (50257581).

Almost surely, 2^100515161 is an apocalyptic number.

It is an amenable number.

100515161 is a deficient number, since it is larger than the sum of its proper divisors (1).

100515161 is an equidigital number, since it uses as much as digits as its factorization.

100515161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150, while the sum is 20.

The square root of 100515161 is about 10025.7249613183. The cubic root of 100515161 is about 464.9545737410.

The spelling of 100515161 in words is "one hundred million, five hundred fifteen thousand, one hundred sixty-one".