155243342551 has 8 divisors (see below), whose sum is σ = 170756014608. Its totient is φ = 141130310200.

The previous prime is 155243342537. The next prime is 155243342633.

155243342551 is nontrivially palindromic in base 10.

155243342551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155243342551 - 2³³ = 146653407959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155243342651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58316980 + ... + 58319641.

It is an arithmetic number, because the mean of its divisors is an integer number (21344501826).

Almost surely, 2^155243342551 is an apocalyptic number.

155243342551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155243342551 is a deficient number, since it is larger than the sum of its proper divisors (15512672057).

155243342551 is an equidigital number, since it uses as much as digits as its factorization.

155243342551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116636654 (or 116636632 counting only the distinct ones).

The product of its digits is 360000, while the sum is 40.

It can be divided in two parts, 155243 and 342551, that added together give a palindrome (497794).

The spelling of 155243342551 in words is "one hundred fifty-five billion, two hundred forty-three million, three hundred forty-two thousand, five hundred fifty-one".