51557311347 has 8 divisors (see below), whose sum is σ = 69684768144. Its totient is φ = 33900697728.

The previous prime is 51557311307. The next prime is 51557311349. The reversal of 51557311347 is 74311375515.

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

It is not a de Polignac number, because 51557311347 - 2¹⁵ = 51557278579 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51557311299 and 51557311308.

It is not an unprimeable number, because it can be changed into a prime (51557311349) 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, 117710538 + ... + 117710975.

It is an arithmetic number, because the mean of its divisors is an integer number (8710596018).

Almost surely, 2^51557311347 is an apocalyptic number.

51557311347 is a deficient number, since it is larger than the sum of its proper divisors (18127456797).

51557311347 is a wasteful number, since it uses less digits than its factorization.

51557311347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235421589.

The product of its digits is 220500, while the sum is 42.

The spelling of 51557311347 in words is "fifty-one billion, five hundred fifty-seven million, three hundred eleven thousand, three hundred forty-seven".