51425397 has 6 divisors (see below), whose sum is σ = 74281142. Its totient is φ = 34283592.

The previous prime is 51425383. The next prime is 51425417. The reversal of 51425397 is 79352415.

51425397 is a `hidden beast` number, since 514 + 2 + 53 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 50893956 + 531441 = 7134^2 + 729^2 .

It is not a de Polignac number, because 51425397 - 2⁶ = 51425333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51425347) 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 5 ways as a sum of consecutive naturals, for example, 2856958 + ... + 2856975.

Almost surely, 2^51425397 is an apocalyptic number.

It is an amenable number.

51425397 is a deficient number, since it is larger than the sum of its proper divisors (22855745).

51425397 is a wasteful number, since it uses less digits than its factorization.

51425397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5713939 (or 5713936 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 51425397 is about 7171.1503261332. The cubic root of 51425397 is about 371.8712049797.

The spelling of 51425397 in words is "fifty-one million, four hundred twenty-five thousand, three hundred ninety-seven".