142321344445551 has 4 divisors (see below), whose sum is σ = 189761792594072. Its totient is φ = 94880896297032.

The previous prime is 142321344445547. The next prime is 142321344445559. The reversal of 142321344445551 is 155544443123241.

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

It is not a de Polignac number, because 142321344445551 - 2² = 142321344445547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142321344445551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142321344445559) 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, 23720224074256 + ... + 23720224074261.

It is an arithmetic number, because the mean of its divisors is an integer number (47440448148518).

Almost surely, 2^{142321344445551} is an apocalyptic number.

142321344445551 is a deficient number, since it is larger than the sum of its proper divisors (47440448148521).

142321344445551 is an equidigital number, since it uses as much as digits as its factorization.

142321344445551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47440448148520.

The product of its digits is 4608000, while the sum is 48.

Adding to 142321344445551 its reverse (155544443123241), we get a palindrome (297865787568792).

The spelling of 142321344445551 in words is "one hundred forty-two trillion, three hundred twenty-one billion, three hundred forty-four million, four hundred forty-five thousand, five hundred fifty-one".