154086221 has 2 divisors, whose sum is σ = 154086222. Its totient is φ = 154086220.

The previous prime is 154086209. The next prime is 154086227. The reversal of 154086221 is 122680451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118504996 + 35581225 = 10886^2 + 5965^2 .

It is a cyclic number.

It is not a de Polignac number, because 154086221 - 2²⁶ = 86977357 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154086227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77043110 + 77043111.

It is an arithmetic number, because the mean of its divisors is an integer number (77043111).

Almost surely, 2^154086221 is an apocalyptic number.

It is an amenable number.

154086221 is a deficient number, since it is larger than the sum of its proper divisors (1).

154086221 is an equidigital number, since it uses as much as digits as its factorization.

154086221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 154086221 is about 12413.1471029711. The cubic root of 154086221 is about 536.1108557468.

The spelling of 154086221 in words is "one hundred fifty-four million, eighty-six thousand, two hundred twenty-one".