51189471 has 12 divisors (see below), whose sum is σ = 74007648. Its totient is φ = 34095264.

The previous prime is 51189449. The next prime is 51189473. The reversal of 51189471 is 17498115.

51189471 is a `hidden beast` number, since 5 + 1 + 189 + 471 = 666.

It is not a de Polignac number, because 51189471 - 2²¹ = 49092319 is a prime.

It is a super-3 number, since 3×51189471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51189473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12451 + ... + 16043.

It is an arithmetic number, because the mean of its divisors is an integer number (6167304).

Almost surely, 2^51189471 is an apocalyptic number.

51189471 is a deficient number, since it is larger than the sum of its proper divisors (22818177).

51189471 is a wasteful number, since it uses less digits than its factorization.

51189471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5182 (or 5179 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 51189471 is about 7154.6817539287. The cubic root of 51189471 is about 371.3016511477.

The spelling of 51189471 in words is "fifty-one million, one hundred eighty-nine thousand, four hundred seventy-one".