321143132436630 has 64 divisors (see below), whose sum is σ = 881281736709120. Its totient is φ = 73368144388224.

The previous prime is 321143132436601. The next prime is 321143132436631. The reversal of 321143132436630 is 36634231341123.

It is a super-2 number, since 2×321143132436630² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321143132436631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 374572549 + ... + 375428928.

It is an arithmetic number, because the mean of its divisors is an integer number (13770027136080).

Almost surely, 2^{321143132436630} is an apocalyptic number.

321143132436630 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

321143132436630 is an abundant number, since it is smaller than the sum of its proper divisors (560138604272490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321143132436630 is a wasteful number, since it uses less digits than its factorization.

321143132436630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750003533.

The product of its (nonzero) digits is 559872, while the sum is 42.

Adding to 321143132436630 its reverse (36634231341123), we get a palindrome (357777363777753).

The spelling of 321143132436630 in words is "three hundred twenty-one trillion, one hundred forty-three billion, one hundred thirty-two million, four hundred thirty-six thousand, six hundred thirty".