51015973 has 4 divisors (see below), whose sum is σ = 51053248. Its totient is φ = 50978700.

The previous prime is 51015953. The next prime is 51016039. The reversal of 51015973 is 37951015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51015973 is a prime.

It is a super-2 number, since 2×51015973² = 5205259002273458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51015953) 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 3 ways as a sum of consecutive naturals, for example, 16503 + ... + 19348.

It is an arithmetic number, because the mean of its divisors is an integer number (12763312).

Almost surely, 2^51015973 is an apocalyptic number.

It is an amenable number.

51015973 is a deficient number, since it is larger than the sum of its proper divisors (37275).

51015973 is a wasteful number, since it uses less digits than its factorization.

51015973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37274.

The product of its (nonzero) digits is 4725, while the sum is 31.

The square root of 51015973 is about 7142.5466746812. The cubic root of 51015973 is about 370.8816884075.

Adding to 51015973 its reverse (37951015), we get a palindrome (88966988).

The spelling of 51015973 in words is "fifty-one million, fifteen thousand, nine hundred seventy-three".