131022247144 has 8 divisors (see below), whose sum is σ = 245666713410. Its totient is φ = 65511123568.

The previous prime is 131022247141. The next prime is 131022247157. The reversal of 131022247144 is 441742220131.

It can be written as a sum of positive squares in only one way, i.e., 109668270244 + 21353976900 = 331162^2 + 146130^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (131022247141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8188890439 + ... + 8188890454.

Almost surely, 2^131022247144 is an apocalyptic number.

It is an amenable number.

131022247144 is a deficient number, since it is larger than the sum of its proper divisors (114644466266).

131022247144 is a wasteful number, since it uses less digits than its factorization.

131022247144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16377780899 (or 16377780895 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

Adding to 131022247144 its reverse (441742220131), we get a palindrome (572764467275).

The spelling of 131022247144 in words is "one hundred thirty-one billion, twenty-two million, two hundred forty-seven thousand, one hundred forty-four".