51118373 has 4 divisors (see below), whose sum is σ = 51151980. Its totient is φ = 51084768.

The previous prime is 51118313. The next prime is 51118393. The reversal of 51118373 is 37381115.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2982529 + 48135844 = 1727^2 + 6938^2 .

It is a cyclic number.

It is not a de Polignac number, because 51118373 - 2¹⁰ = 51117349 is a prime.

It is a super-2 number, since 2×51118373² = 5226176116334258, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51118313) 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, 14408 + ... + 17601.

It is an arithmetic number, because the mean of its divisors is an integer number (12787995).

Almost surely, 2^51118373 is an apocalyptic number.

It is an amenable number.

51118373 is a deficient number, since it is larger than the sum of its proper divisors (33607).

51118373 is a wasteful number, since it uses less digits than its factorization.

51118373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33606.

The product of its digits is 2520, while the sum is 29.

The square root of 51118373 is about 7149.7113927766. The cubic root of 51118373 is about 371.1296689305.

Adding to 51118373 its reverse (37381115), we get a palindrome (88499488).

The spelling of 51118373 in words is "fifty-one million, one hundred eighteen thousand, three hundred seventy-three".