31553253222143 has 4 divisors (see below), whose sum is σ = 31561163292120. Its totient is φ = 31545343152168.

The previous prime is 31553253222137. The next prime is 31553253222191. The reversal of 31553253222143 is 34122235235513.

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 31553253222143 - 2⁸ = 31553253221887 is a prime.

It is a super-2 number, since 2×31553253222143² (a number of 28 digits) contains 22 as substring.

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 31553253222143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31553253242143) 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, 3955029005 + ... + 3955036982.

It is an arithmetic number, because the mean of its divisors is an integer number (7890290823030).

Almost surely, 2^{31553253222143} is an apocalyptic number.

31553253222143 is a deficient number, since it is larger than the sum of its proper divisors (7910069977).

31553253222143 is an equidigital number, since it uses as much as digits as its factorization.

31553253222143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7910069976.

The product of its digits is 648000, while the sum is 41.

Adding to 31553253222143 its reverse (34122235235513), we get a palindrome (65675488457656).

The spelling of 31553253222143 in words is "thirty-one trillion, five hundred fifty-three billion, two hundred fifty-three million, two hundred twenty-two thousand, one hundred forty-three".