155242152212551 has 2 divisors, whose sum is σ = 155242152212552. Its totient is φ = 155242152212550.

The previous prime is 155242152212467. The next prime is 155242152212617. The reversal of 155242152212551 is 155212251242551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155242152212551 - 2²⁵ = 155242118658119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155242152212498 and 155242152212507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155242158212551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77621076106275 + 77621076106276.

It is an arithmetic number, because the mean of its divisors is an integer number (77621076106276).

Almost surely, 2^{155242152212551} is an apocalyptic number.

155242152212551 is a deficient number, since it is larger than the sum of its proper divisors (1).

155242152212551 is an equidigital number, since it uses as much as digits as its factorization.

155242152212551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 400000, while the sum is 43.

The spelling of 155242152212551 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-one".