51015245 has 8 divisors (see below), whose sum is σ = 61906680. Its totient is φ = 40353280.

The previous prime is 51015241. The next prime is 51015253. The reversal of 51015245 is 54251015.

It is a happy number.

51015245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4748041 + 46267204 = 2179^2 + 6802^2 .

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

It is not a de Polignac number, because 51015245 - 2² = 51015241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51015245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51015241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56876 + ... + 57765.

It is an arithmetic number, because the mean of its divisors is an integer number (7738335).

Almost surely, 2^51015245 is an apocalyptic number.

It is an amenable number.

51015245 is a deficient number, since it is larger than the sum of its proper divisors (10891435).

51015245 is a wasteful number, since it uses less digits than its factorization.

51015245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114735.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 51015245 is about 7142.4957122843. The cubic root of 51015245 is about 370.8799242335.

The spelling of 51015245 in words is "fifty-one million, fifteen thousand, two hundred forty-five".