51538697 has 8 divisors (see below), whose sum is σ = 62001600. Its totient is φ = 41850864.

The previous prime is 51538693. The next prime is 51538727. The reversal of 51538697 is 79683515.

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 51538697 - 2² = 51538693 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51538693) 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, 193622 + ... + 193887.

It is an arithmetic number, because the mean of its divisors is an integer number (7750200).

Almost surely, 2^51538697 is an apocalyptic number.

It is an amenable number.

51538697 is a deficient number, since it is larger than the sum of its proper divisors (10462903).

51538697 is a wasteful number, since it uses less digits than its factorization.

51538697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387535.

The product of its digits is 226800, while the sum is 44.

The square root of 51538697 is about 7179.0456886692. The cubic root of 51538697 is about 372.1441058254.

The spelling of 51538697 in words is "fifty-one million, five hundred thirty-eight thousand, six hundred ninety-seven".