1577221442141 has 4 divisors (see below), whose sum is σ = 1583358490812. Its totient is φ = 1571084393472.

The previous prime is 1577221442119. The next prime is 1577221442161. The reversal of 1577221442141 is 1412441227751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1278586516516 + 298634925625 = 1130746^2 + 546475^2 .

It is a cyclic number.

It is not a de Polignac number, because 1577221442141 - 2⁶ = 1577221442077 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 (1577221442161) 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, 3068523950 + ... + 3068524463.

It is an arithmetic number, because the mean of its divisors is an integer number (395839622703).

Almost surely, 2^{1577221442141} is an apocalyptic number.

It is an amenable number.

1577221442141 is a deficient number, since it is larger than the sum of its proper divisors (6137048671).

1577221442141 is an equidigital number, since it uses as much as digits as its factorization.

1577221442141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6137048670.

The product of its digits is 125440, while the sum is 41.

Adding to 1577221442141 its reverse (1412441227751), we get a palindrome (2989662669892).

The spelling of 1577221442141 in words is "one trillion, five hundred seventy-seven billion, two hundred twenty-one million, four hundred forty-two thousand, one hundred forty-one".