51472891 has 2 divisors, whose sum is σ = 51472892. Its totient is φ = 51472890.

The previous prime is 51472879. The next prime is 51472909. The reversal of 51472891 is 19827415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51472891 - 2¹¹ = 51470843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51472891.

It is not a weakly prime, because it can be changed into another prime (51472801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25736445 + 25736446.

It is an arithmetic number, because the mean of its divisors is an integer number (25736446).

Almost surely, 2^51472891 is an apocalyptic number.

51472891 is a deficient number, since it is larger than the sum of its proper divisors (1).

51472891 is an equidigital number, since it uses as much as digits as its factorization.

51472891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 51472891 is about 7174.4610250527. The cubic root of 51472891 is about 371.9856504851.

The spelling of 51472891 in words is "fifty-one million, four hundred seventy-two thousand, eight hundred ninety-one".