131039287444 has 24 divisors (see below), whose sum is σ = 247102323048. Its totient is φ = 60444487680.

The previous prime is 131039287439. The next prime is 131039287453. The reversal of 131039287444 is 444782930131.

It can be written as a sum of positive squares in 4 ways, for example, as 43529815044 + 87509472400 = 208638^2 + 295820^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 131039287394 and 131039287403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 642637 + ... + 821620.

It is an arithmetic number, because the mean of its divisors is an integer number (10295930127).

Almost surely, 2^131039287444 is an apocalyptic number.

It is an amenable number.

131039287444 is a deficient number, since it is larger than the sum of its proper divisors (116063035604).

131039287444 is a wasteful number, since it uses less digits than its factorization.

131039287444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465995 (or 1465993 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 131039287444 in words is "one hundred thirty-one billion, thirty-nine million, two hundred eighty-seven thousand, four hundred forty-four".