551243342155 has 16 divisors (see below), whose sum is σ = 721677003264. Its totient is φ = 400876829280.

The previous prime is 551243342131. The next prime is 551243342171.

551243342155 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 551243342155 - 2¹⁵ = 551243309387 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 486814 + ... + 1157356.

It is an arithmetic number, because the mean of its divisors is an integer number (45104812704).

Almost surely, 2^551243342155 is an apocalyptic number.

551243342155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

551243342155 is a deficient number, since it is larger than the sum of its proper divisors (170433661109).

551243342155 is a wasteful number, since it uses less digits than its factorization.

551243342155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685506.

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

It can be divided in two parts, 551243 and 342155, that added together give a palindrome (893398).

The spelling of 551243342155 in words is "five hundred fifty-one billion, two hundred forty-three million, three hundred forty-two thousand, one hundred fifty-five".