1551125320323 has 4 divisors (see below), whose sum is σ = 2068167093768. Its totient is φ = 1034083546880.

The previous prime is 1551125320289. The next prime is 1551125320333. The reversal of 1551125320323 is 3230235211551.

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

It is a cyclic number.

It is not a de Polignac number, because 1551125320323 - 2²⁴ = 1551108543107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1551125320333) 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, 258520886718 + ... + 258520886723.

It is an arithmetic number, because the mean of its divisors is an integer number (517041773442).

Almost surely, 2^{1551125320323} is an apocalyptic number.

1551125320323 is a deficient number, since it is larger than the sum of its proper divisors (517041773445).

1551125320323 is an equidigital number, since it uses as much as digits as its factorization.

1551125320323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517041773444.

The product of its (nonzero) digits is 27000, while the sum is 33.

The spelling of 1551125320323 in words is "one trillion, five hundred fifty-one billion, one hundred twenty-five million, three hundred twenty thousand, three hundred twenty-three".