51531131026 has 8 divisors (see below), whose sum is σ = 77314241340. Its totient is φ = 25759717248.

The previous prime is 51531131009. The next prime is 51531131063. The reversal of 51531131026 is 62013113515.

It can be written as a sum of positive squares in 2 ways, for example, as 51529454001 + 1677025 = 227001^2 + 1295^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 51531130985 and 51531131003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2913111 + ... + 2930746.

Almost surely, 2^51531131026 is an apocalyptic number.

51531131026 is a deficient number, since it is larger than the sum of its proper divisors (25783110314).

51531131026 is a wasteful number, since it uses less digits than its factorization.

51531131026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5848268.

The product of its (nonzero) digits is 2700, while the sum is 28.

The spelling of 51531131026 in words is "fifty-one billion, five hundred thirty-one million, one hundred thirty-one thousand, twenty-six".