51397063 has 4 divisors (see below), whose sum is σ = 51460488. Its totient is φ = 51333640.

The previous prime is 51397061. The next prime is 51397081. The reversal of 51397063 is 36079315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51397063 - 2¹ = 51397061 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 (51397061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30481 + ... + 32122.

It is an arithmetic number, because the mean of its divisors is an integer number (12865122).

Almost surely, 2^51397063 is an apocalyptic number.

51397063 is a deficient number, since it is larger than the sum of its proper divisors (63425).

51397063 is an equidigital number, since it uses as much as digits as its factorization.

51397063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63424.

The product of its (nonzero) digits is 17010, while the sum is 34.

The square root of 51397063 is about 7169.1744992014. The cubic root of 51397063 is about 371.8028954475.

The spelling of 51397063 in words is "fifty-one million, three hundred ninety-seven thousand, sixty-three".