1625310342221 has 4 divisors (see below), whose sum is σ = 1652857975200. Its totient is φ = 1597762709244.

The previous prime is 1625310342211. The next prime is 1625310342289. The reversal of 1625310342221 is 1222430135261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1625310342221 - 2⁶ = 1625310342157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625310342211) 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, 13773816401 + ... + 13773816518.

It is an arithmetic number, because the mean of its divisors is an integer number (413214493800).

Almost surely, 2^{1625310342221} is an apocalyptic number.

It is an amenable number.

1625310342221 is a deficient number, since it is larger than the sum of its proper divisors (27547632979).

1625310342221 is an equidigital number, since it uses as much as digits as its factorization.

1625310342221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27547632978.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 1625310342221 its reverse (1222430135261), we get a palindrome (2847740477482).

The spelling of 1625310342221 in words is "one trillion, six hundred twenty-five billion, three hundred ten million, three hundred forty-two thousand, two hundred twenty-one".