51597557 has 8 divisors (see below), whose sum is σ = 57661632. Its totient is φ = 45762400.

The previous prime is 51597529. The next prime is 51597563. The reversal of 51597557 is 75579515.

It is a happy number.

51597557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51597557 - 2¹² = 51593461 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 (51597577) 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 in 7 ways as a sum of consecutive naturals, for example, 56753 + ... + 57654.

It is an arithmetic number, because the mean of its divisors is an integer number (7207704).

Almost surely, 2^51597557 is an apocalyptic number.

It is an amenable number.

51597557 is a deficient number, since it is larger than the sum of its proper divisors (6064075).

51597557 is a wasteful number, since it uses less digits than its factorization.

51597557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114459.

The product of its digits is 275625, while the sum is 44.

The square root of 51597557 is about 7183.1439495530. The cubic root of 51597557 is about 372.2857215430.

The spelling of 51597557 in words is "fifty-one million, five hundred ninety-seven thousand, five hundred fifty-seven".