154244161 has 2 divisors, whose sum is σ = 154244162. Its totient is φ = 154244160.

The previous prime is 154244159. The next prime is 154244171. The reversal of 154244161 is 161442451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151782400 + 2461761 = 12320^2 + 1569^2 .

It is a cyclic number.

It is not a de Polignac number, because 154244161 - 2¹ = 154244159 is a prime.

It is a super-2 number, since 2×154244161² = 47582522405187842, which contains 22 as substring.

Together with 154244159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (154244131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77122080 + 77122081.

It is an arithmetic number, because the mean of its divisors is an integer number (77122081).

Almost surely, 2^154244161 is an apocalyptic number.

It is an amenable number.

154244161 is a deficient number, since it is larger than the sum of its proper divisors (1).

154244161 is an equidigital number, since it uses as much as digits as its factorization.

154244161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 28.

The square root of 154244161 is about 12419.5072768609. The cubic root of 154244161 is about 536.2939662896.

The spelling of 154244161 in words is "one hundred fifty-four million, two hundred forty-four thousand, one hundred sixty-one".