51347973 has 16 divisors (see below), whose sum is σ = 72769536. Its totient is φ = 32094720.

The previous prime is 51347969. The next prime is 51347993. The reversal of 51347973 is 37974315.

It is a happy number.

It is not a de Polignac number, because 51347973 - 2² = 51347969 is a prime.

It is a super-2 number, since 2×51347973² = 5273228662417458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51347993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12540 + ... + 16122.

It is an arithmetic number, because the mean of its divisors is an integer number (4548096).

Almost surely, 2^51347973 is an apocalyptic number.

It is an amenable number.

51347973 is a deficient number, since it is larger than the sum of its proper divisors (21421563).

51347973 is a wasteful number, since it uses less digits than its factorization.

51347973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3884.

The product of its digits is 79380, while the sum is 39.

The square root of 51347973 is about 7165.7499956390. The cubic root of 51347973 is about 371.6844864892.

The spelling of 51347973 in words is "fifty-one million, three hundred forty-seven thousand, nine hundred seventy-three".