154552286221 has 2 divisors, whose sum is σ = 154552286222. Its totient is φ = 154552286220.

The previous prime is 154552286197. The next prime is 154552286227. The reversal of 154552286221 is 122682255451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89034204996 + 65518081225 = 298386^2 + 255965^2 .

It is a cyclic number.

It is not a de Polignac number, because 154552286221 - 2³³ = 145962351629 is a prime.

It is a super-2 number, since 2×154552286221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154552286227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77276143110 + 77276143111.

It is an arithmetic number, because the mean of its divisors is an integer number (77276143111).

Almost surely, 2^154552286221 is an apocalyptic number.

It is an amenable number.

154552286221 is a deficient number, since it is larger than the sum of its proper divisors (1).

154552286221 is an equidigital number, since it uses as much as digits as its factorization.

154552286221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384000, while the sum is 43.

The spelling of 154552286221 in words is "one hundred fifty-four billion, five hundred fifty-two million, two hundred eighty-six thousand, two hundred twenty-one".