154301981 has 2 divisors, whose sum is σ = 154301982. Its totient is φ = 154301980.

The previous prime is 154301977. The next prime is 154302053. The reversal of 154301981 is 189103451.

154301981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150062500 + 4239481 = 12250^2 + 2059^2 .

It is an emirp because it is prime and its reverse (189103451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154301981 - 2² = 154301977 is a prime.

It is a super-2 number, since 2×154301981² = 47618202681048722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154301971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77150990 + 77150991.

It is an arithmetic number, because the mean of its divisors is an integer number (77150991).

Almost surely, 2^154301981 is an apocalyptic number.

It is an amenable number.

154301981 is a deficient number, since it is larger than the sum of its proper divisors (1).

154301981 is an equidigital number, since it uses as much as digits as its factorization.

154301981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 154301981 is about 12421.8348483628. The cubic root of 154301981 is about 536.3609696759.

The spelling of 154301981 in words is "one hundred fifty-four million, three hundred one thousand, nine hundred eighty-one".