105162181 has 2 divisors, whose sum is σ = 105162182. Its totient is φ = 105162180.

The previous prime is 105162173. The next prime is 105162209. The reversal of 105162181 is 181261501.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93431556 + 11730625 = 9666^2 + 3425^2 .

It is a cyclic number.

It is not a de Polignac number, because 105162181 - 2³ = 105162173 is a prime.

It is a super-2 number, since 2×105162181² = 22118168625353522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105162781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52581090 + 52581091.

It is an arithmetic number, because the mean of its divisors is an integer number (52581091).

Almost surely, 2^105162181 is an apocalyptic number.

It is an amenable number.

105162181 is a deficient number, since it is larger than the sum of its proper divisors (1).

105162181 is an equidigital number, since it uses as much as digits as its factorization.

105162181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 105162181 is about 10254.8613349962. The cubic root of 105162181 is about 472.0121684237.

The spelling of 105162181 in words is "one hundred five million, one hundred sixty-two thousand, one hundred eighty-one".