51155471 has 2 divisors, whose sum is σ = 51155472. Its totient is φ = 51155470.

The previous prime is 51155453. The next prime is 51155477. The reversal of 51155471 is 17455115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51155471 - 2¹⁴ = 51139087 is a prime.

It is a super-3 number, since 3×51155471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51155477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25577735 + 25577736.

It is an arithmetic number, because the mean of its divisors is an integer number (25577736).

Almost surely, 2^51155471 is an apocalyptic number.

51155471 is a deficient number, since it is larger than the sum of its proper divisors (1).

51155471 is an equidigital number, since it uses as much as digits as its factorization.

51155471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3500, while the sum is 29.

The square root of 51155471 is about 7152.3052927011. The cubic root of 51155471 is about 371.2194268678.

The spelling of 51155471 in words is "fifty-one million, one hundred fifty-five thousand, four hundred seventy-one".