51397073 has 16 divisors (see below), whose sum is σ = 63517440. Its totient is φ = 40499136.

The previous prime is 51397061. The next prime is 51397081. The reversal of 51397073 is 37079315.

It is a cyclic number.

It is not a de Polignac number, because 51397073 - 2¹² = 51392977 is a prime.

It is a super-2 number, since 2×51397073² = 5283318225934658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51397013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24188 + ... + 26226.

It is an arithmetic number, because the mean of its divisors is an integer number (3969840).

Almost surely, 2^51397073 is an apocalyptic number.

It is an amenable number.

51397073 is a deficient number, since it is larger than the sum of its proper divisors (12120367).

51397073 is a wasteful number, since it uses less digits than its factorization.

51397073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336.

The product of its (nonzero) digits is 19845, while the sum is 35.

The square root of 51397073 is about 7169.1751966318. The cubic root of 51397073 is about 371.8029195606.

The spelling of 51397073 in words is "fifty-one million, three hundred ninety-seven thousand, seventy-three".