51031147 has 2 divisors, whose sum is σ = 51031148. Its totient is φ = 51031146.

The previous prime is 51031133. The next prime is 51031157. The reversal of 51031147 is 74113015.

51031147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51031147 - 2²³ = 42642539 is a prime.

It is not a weakly prime, because it can be changed into another prime (51031117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25515573 + 25515574.

It is an arithmetic number, because the mean of its divisors is an integer number (25515574).

Almost surely, 2^51031147 is an apocalyptic number.

51031147 is a deficient number, since it is larger than the sum of its proper divisors (1).

51031147 is an equidigital number, since it uses as much as digits as its factorization.

51031147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 51031147 is about 7143.6088218771. The cubic root of 51031147 is about 370.9184559827.

The spelling of 51031147 in words is "fifty-one million, thirty-one thousand, one hundred forty-seven".