51396287 has 8 divisors (see below), whose sum is σ = 54482400. Its totient is φ = 48317184.

The previous prime is 51396269. The next prime is 51396299. The reversal of 51396287 is 78269315.

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

It is a cyclic number.

It is not a de Polignac number, because 51396287 - 2¹² = 51392191 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 (51396227) 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, 26414 + ... + 28292.

It is an arithmetic number, because the mean of its divisors is an integer number (6810300).

Almost surely, 2^51396287 is an apocalyptic number.

51396287 is a deficient number, since it is larger than the sum of its proper divisors (3086113).

51396287 is a wasteful number, since it uses less digits than its factorization.

51396287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3505.

The product of its digits is 90720, while the sum is 41.

The square root of 51396287 is about 7169.1203784007. The cubic root of 51396287 is about 371.8010242608.

The spelling of 51396287 in words is "fifty-one million, three hundred ninety-six thousand, two hundred eighty-seven".