155221152054127 has 2 divisors, whose sum is σ = 155221152054128. Its totient is φ = 155221152054126.

The previous prime is 155221152054119. The next prime is 155221152054139. The reversal of 155221152054127 is 721450251122551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155221152054127 - 2³ = 155221152054119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155221152054187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77610576027063 + 77610576027064.

It is an arithmetic number, because the mean of its divisors is an integer number (77610576027064).

Almost surely, 2^{155221152054127} is an apocalyptic number.

155221152054127 is a deficient number, since it is larger than the sum of its proper divisors (1).

155221152054127 is an equidigital number, since it uses as much as digits as its factorization.

155221152054127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280000, while the sum is 43.

The spelling of 155221152054127 in words is "one hundred fifty-five trillion, two hundred twenty-one billion, one hundred fifty-two million, fifty-four thousand, one hundred twenty-seven".