1621031305143 has 16 divisors (see below), whose sum is σ = 2238451393536. Its totient is φ = 1042797077280.

The previous prime is 1621031305129. The next prime is 1621031305181. The reversal of 1621031305143 is 3415031301261.

It is not a de Polignac number, because 1621031305143 - 2⁹ = 1621031304631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1621031305143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621031305183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80952496 + ... + 80972517.

It is an arithmetic number, because the mean of its divisors is an integer number (139903212096).

Almost surely, 2^{1621031305143} is an apocalyptic number.

1621031305143 is a deficient number, since it is larger than the sum of its proper divisors (617420088393).

1621031305143 is a wasteful number, since it uses less digits than its factorization.

1621031305143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161925134.

The product of its (nonzero) digits is 6480, while the sum is 30.

The spelling of 1621031305143 in words is "one trillion, six hundred twenty-one billion, thirty-one million, three hundred five thousand, one hundred forty-three".