2131243222544 has 10 divisors (see below), whose sum is σ = 4129283743710. Its totient is φ = 1065621611264.

The previous prime is 2131243222541. The next prime is 2131243222553. The reversal of 2131243222544 is 4452223421312.

It can be written as a sum of positive squares in only one way, i.e., 1334487040000 + 796756182544 = 1155200^2 + 892612^2 .

It is not an unprimeable number, because it can be changed into a prime (2131243222541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66601350689 + ... + 66601350720.

It is an arithmetic number, because the mean of its divisors is an integer number (412928374371).

Almost surely, 2^{2131243222544} is an apocalyptic number.

It is an amenable number.

2131243222544 is a deficient number, since it is larger than the sum of its proper divisors (1998040521166).

2131243222544 is a wasteful number, since it uses less digits than its factorization.

2131243222544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133202701417 (or 133202701411 counting only the distinct ones).

The product of its digits is 92160, while the sum is 35.

Adding to 2131243222544 its reverse (4452223421312), we get a palindrome (6583466643856).

The spelling of 2131243222544 in words is "two trillion, one hundred thirty-one billion, two hundred forty-three million, two hundred twenty-two thousand, five hundred forty-four".