51588491161 has 3 divisors (see below), whose sum is σ = 51588718293. Its totient is φ = 51588264030.

The previous prime is 51588491153. The next prime is 51588491173. The reversal of 51588491161 is 16119488515.

The square root of 51588491161 is 227131.

It is a perfect power (a square), and thus also a powerful number.

51588491161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 51588491161 - 2³ = 51588491153 is a prime.

It is a super-2 number, since 2×51588491161² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51588491131) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 113566 + ... + 340696.

It is an arithmetic number, because the mean of its divisors is an integer number (17196239431).

Almost surely, 2^51588491161 is an apocalyptic number.

51588491161 is the 227131-st square number.

51588491161 is the 113566-th centered octagonal number.

It is an amenable number.

51588491161 is a deficient number, since it is larger than the sum of its proper divisors (227132).

51588491161 is an frugal number, since it uses more digits than its factorization.

51588491161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454262 (or 227131 counting only the distinct ones).

The product of its digits is 345600, while the sum is 49.

Multiplying 51588491161 by its sum of digits (49), we get a square (2527836066889 = 1589917²).

The spelling of 51588491161 in words is "fifty-one billion, five hundred eighty-eight million, four hundred ninety-one thousand, one hundred sixty-one".