155242152212555 has 4 divisors (see below), whose sum is σ = 186290582655072. Its totient is φ = 124193721770040.

The previous prime is 155242152212551. The next prime is 155242152212617. The reversal of 155242152212555 is 555212251242551.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 155242152212555 - 2² = 155242152212551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155242152212551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15524215221251 + ... + 15524215221260.

It is an arithmetic number, because the mean of its divisors is an integer number (46572645663768).

Almost surely, 2^{155242152212555} is an apocalyptic number.

155242152212555 is a deficient number, since it is larger than the sum of its proper divisors (31048430442517).

155242152212555 is an equidigital number, since it uses as much as digits as its factorization.

155242152212555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31048430442516.

The product of its digits is 2000000, while the sum is 47.

The spelling of 155242152212555 in words is "one hundred fifty-five trillion, two hundred forty-two billion, one hundred fifty-two million, two hundred twelve thousand, five hundred fifty-five".