51532171257 has 8 divisors (see below), whose sum is σ = 78525213376. Its totient is φ = 29446954992.

The previous prime is 51532171211. The next prime is 51532171289. The reversal of 51532171257 is 75217123515.

It is a happy number.

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

It is not a de Polignac number, because 51532171257 - 2⁸ = 51532171001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51532171297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1226956438 + ... + 1226956479.

It is an arithmetic number, because the mean of its divisors is an integer number (9815651672).

Almost surely, 2^51532171257 is an apocalyptic number.

It is an amenable number.

51532171257 is a deficient number, since it is larger than the sum of its proper divisors (26993042119).

51532171257 is a wasteful number, since it uses less digits than its factorization.

51532171257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2453912927.

The product of its digits is 73500, while the sum is 39.

The spelling of 51532171257 in words is "fifty-one billion, five hundred thirty-two million, one hundred seventy-one thousand, two hundred fifty-seven".