51997038 has 8 divisors (see below), whose sum is σ = 103994088. Its totient is φ = 17332344.

The previous prime is 51997037. The next prime is 51997039. The reversal of 51997038 is 83079915.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51997037) and next prime (51997039).

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

51997038 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51997031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4333081 + ... + 4333092.

It is an arithmetic number, because the mean of its divisors is an integer number (12999261).

Almost surely, 2^51997038 is an apocalyptic number.

51997038 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51997038 is a wasteful number, since it uses less digits than its factorization.

51997038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8666178.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 51997038 is about 7210.8971702556. The cubic root of 51997038 is about 373.2440285612.

The spelling of 51997038 in words is "fifty-one million, nine hundred ninety-seven thousand, thirty-eight".