1551551234323 has 4 divisors (see below), whose sum is σ = 1580825785968. Its totient is φ = 1522276682680.

The previous prime is 1551551234297. The next prime is 1551551234347. The reversal of 1551551234323 is 3234321551551.

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

It is not a de Polignac number, because 1551551234323 - 2⁹ = 1551551233811 is a prime.

It is a super-2 number, since 2×1551551234323² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1551551634323) 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 3 ways as a sum of consecutive naturals, for example, 14637275743 + ... + 14637275848.

It is an arithmetic number, because the mean of its divisors is an integer number (395206446492).

Almost surely, 2^{1551551234323} is an apocalyptic number.

1551551234323 is a deficient number, since it is larger than the sum of its proper divisors (29274551645).

1551551234323 is an equidigital number, since it uses as much as digits as its factorization.

1551551234323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29274551644.

The product of its digits is 270000, while the sum is 40.

Adding to 1551551234323 its reverse (3234321551551), we get a palindrome (4785872785874).

The spelling of 1551551234323 in words is "one trillion, five hundred fifty-one billion, five hundred fifty-one million, two hundred thirty-four thousand, three hundred twenty-three".