51440343 has 4 divisors (see below), whose sum is σ = 68587128. Its totient is φ = 34293560.

The previous prime is 51440327. The next prime is 51440359. The reversal of 51440343 is 34304415.

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

It is an interprime number because it is at equal distance from previous prime (51440327) and next prime (51440359).

It is a cyclic number.

It is not a de Polignac number, because 51440343 - 2⁴ = 51440327 is a prime.

It is a super-2 number, since 2×51440343² = 5292217775915298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51440303) 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, 8573388 + ... + 8573393.

It is an arithmetic number, because the mean of its divisors is an integer number (17146782).

Almost surely, 2^51440343 is an apocalyptic number.

51440343 is a deficient number, since it is larger than the sum of its proper divisors (17146785).

51440343 is a wasteful number, since it uses less digits than its factorization.

51440343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17146784.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 51440343 is about 7172.1923426523. The cubic root of 51440343 is about 371.9072277039.

Adding to 51440343 its reverse (34304415), we get a palindrome (85744758).

The spelling of 51440343 in words is "fifty-one million, four hundred forty thousand, three hundred forty-three".