621531130500346 has 20 divisors (see below), whose sum is σ = 1025519997662010. Its totient is φ = 282514150214120.

The previous prime is 621531130500341. The next prime is 621531130500347. The reversal of 621531130500346 is 643005031135126.

It can be written as a sum of positive squares in only one way, i.e., 611338531518121 + 10192598982225 = 24725261^2 + 3192585^2 .

It is a super-2 number, since 2×621531130500346² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 621531130500299 and 621531130500308.

It is not an unprimeable number, because it can be changed into a prime (621531130500341) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10612823845 + ... + 10612882408.

Almost surely, 2^{621531130500346} is an apocalyptic number.

621531130500346 is a deficient number, since it is larger than the sum of its proper divisors (403988867161664).

621531130500346 is an equidigital number, since it uses as much as digits as its factorization.

621531130500346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21225706299 (or 21225706266 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 621531130500346 in words is "six hundred twenty-one trillion, five hundred thirty-one billion, one hundred thirty million, five hundred thousand, three hundred forty-six".