51447131681156 has 12 divisors (see below), whose sum is σ = 90051747001692. Its totient is φ = 25718061109248.

The previous prime is 51447131681093. The next prime is 51447131681219. The reversal of 51447131681156 is 65118613174415.

It is an interprime number because it is at equal distance from previous prime (51447131681093) and next prime (51447131681219).

It can be written as a sum of positive squares in 2 ways, for example, as 38152240562500 + 13294891118656 = 6176750^2 + 3646216^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51447131681098 and 51447131681107.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1376161805 + ... + 1376199188.

It is an arithmetic number, because the mean of its divisors is an integer number (7504312250141).

Almost surely, 2^{51447131681156} is an apocalyptic number.

It is an amenable number.

51447131681156 is a deficient number, since it is larger than the sum of its proper divisors (38604615320536).

51447131681156 is a wasteful number, since it uses less digits than its factorization.

51447131681156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752365670 (or 2752365668 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 53.

The spelling of 51447131681156 in words is "fifty-one trillion, four hundred forty-seven billion, one hundred thirty-one million, six hundred eighty-one thousand, one hundred fifty-six".