321142353551 has 8 divisors (see below), whose sum is σ = 328226939904. Its totient is φ = 314068257720.

The previous prime is 321142353533. The next prime is 321142353583. The reversal of 321142353551 is 155353241123.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 321142353551 - 2⁶ = 321142353487 is a prime.

It is a super-2 number, since 2×321142353551² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321142352551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2560715 + ... + 2683196.

It is an arithmetic number, because the mean of its divisors is an integer number (41028367488).

Almost surely, 2^321142353551 is an apocalyptic number.

321142353551 is a deficient number, since it is larger than the sum of its proper divisors (7084586353).

321142353551 is a wasteful number, since it uses less digits than its factorization.

321142353551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5245261.

The product of its digits is 54000, while the sum is 35.

Adding to 321142353551 its reverse (155353241123), we get a palindrome (476495594674).

The spelling of 321142353551 in words is "three hundred twenty-one billion, one hundred forty-two million, three hundred fifty-three thousand, five hundred fifty-one".