51451047 has 12 divisors (see below), whose sum is σ = 74977344. Its totient is φ = 33996480.

The previous prime is 51451039. The next prime is 51451087. The reversal of 51451047 is 74015415.

It is a happy number.

It is not a de Polignac number, because 51451047 - 2³ = 51451039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51451047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51451087) 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 in 11 ways as a sum of consecutive naturals, for example, 24279 + ... + 26312.

It is an arithmetic number, because the mean of its divisors is an integer number (6248112).

Almost surely, 2^51451047 is an apocalyptic number.

51451047 is a deficient number, since it is larger than the sum of its proper divisors (23526297).

51451047 is a wasteful number, since it uses less digits than its factorization.

51451047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50710 (or 50707 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 51451047 is about 7172.9385191844. The cubic root of 51451047 is about 371.9330221073.

The spelling of 51451047 in words is "fifty-one million, four hundred fifty-one thousand, forty-seven".