51286015 has 8 divisors (see below), whose sum is σ = 67138128. Its totient is φ = 37298880.

The previous prime is 51286013. The next prime is 51286031. The reversal of 51286015 is 51068215.

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

It is not a de Polignac number, because 51286015 - 2¹ = 51286013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51286013) 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, 466182 + ... + 466291.

It is an arithmetic number, because the mean of its divisors is an integer number (8392266).

Almost surely, 2^51286015 is an apocalyptic number.

51286015 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51286015 is a deficient number, since it is larger than the sum of its proper divisors (15852113).

51286015 is a wasteful number, since it uses less digits than its factorization.

51286015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932489.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 51286015 is about 7161.4254865913. The cubic root of 51286015 is about 371.5349311144.

The spelling of 51286015 in words is "fifty-one million, two hundred eighty-six thousand, fifteen".