155221152054139 has 2 divisors, whose sum is σ = 155221152054140. Its totient is φ = 155221152054138.

The previous prime is 155221152054127. The next prime is 155221152054151. The reversal of 155221152054139 is 931450251122551.

It is a balanced prime because it is at equal distance from previous prime (155221152054127) and next prime (155221152054151).

It is a cyclic number.

It is not a de Polignac number, because 155221152054139 - 2¹¹ = 155221152052091 is a prime.

It is not a weakly prime, because it can be changed into another prime (155221152054119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77610576027069 + 77610576027070.

It is an arithmetic number, because the mean of its divisors is an integer number (77610576027070).

Almost surely, 2^{155221152054139} is an apocalyptic number.

155221152054139 is a deficient number, since it is larger than the sum of its proper divisors (1).

155221152054139 is an equidigital number, since it uses as much as digits as its factorization.

155221152054139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540000, while the sum is 46.

The spelling of 155221152054139 in words is "one hundred fifty-five trillion, two hundred twenty-one billion, one hundred fifty-two million, fifty-four thousand, one hundred thirty-nine".