51072015 has 8 divisors (see below), whose sum is σ = 81715248. Its totient is φ = 27238400.

The previous prime is 51071941. The next prime is 51072017. The reversal of 51072015 is 51027015.

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

It is not a de Polignac number, because 51072015 - 2¹⁰ = 51070991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51071982 and 51072000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51072017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1702386 + ... + 1702415.

It is an arithmetic number, because the mean of its divisors is an integer number (10214406).

Almost surely, 2^51072015 is an apocalyptic number.

51072015 is a deficient number, since it is larger than the sum of its proper divisors (30643233).

51072015 is a wasteful number, since it uses less digits than its factorization.

51072015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3404809.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 51072015 is about 7146.4687083902. The cubic root of 51072015 is about 371.0174455316.

The spelling of 51072015 in words is "fifty-one million, seventy-two thousand, fifteen".