51456457 has 8 divisors (see below), whose sum is σ = 55576584. Its totient is φ = 47359488.

The previous prime is 51456403. The next prime is 51456473. The reversal of 51456457 is 75465415.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1032256 + 50424201 = 1016^2 + 7101^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51456457 - 2¹¹ = 51454409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51456487) 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 7 ways as a sum of consecutive naturals, for example, 1018 + ... + 10195.

It is an arithmetic number, because the mean of its divisors is an integer number (6947073).

Almost surely, 2^51456457 is an apocalyptic number.

It is an amenable number.

51456457 is a deficient number, since it is larger than the sum of its proper divisors (4120127).

51456457 is a wasteful number, since it uses less digits than its factorization.

51456457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11579.

The product of its digits is 84000, while the sum is 37.

The square root of 51456457 is about 7173.3156211058. The cubic root of 51456457 is about 371.9460577159.

The spelling of 51456457 in words is "fifty-one million, four hundred fifty-six thousand, four hundred fifty-seven".