51554143 has 4 divisors (see below), whose sum is σ = 51568888. Its totient is φ = 51539400.

The previous prime is 51554131. The next prime is 51554161. The reversal of 51554143 is 34145515.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51554143 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 (51554443) 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, 1180 + ... + 10222.

It is an arithmetic number, because the mean of its divisors is an integer number (12892222).

Almost surely, 2^51554143 is an apocalyptic number.

51554143 is a deficient number, since it is larger than the sum of its proper divisors (14745).

51554143 is an equidigital number, since it uses as much as digits as its factorization.

51554143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14744.

The product of its digits is 6000, while the sum is 28.

The square root of 51554143 is about 7180.1213778041. The cubic root of 51554143 is about 372.1812789532.

Adding to 51554143 its reverse (34145515), we get a palindrome (85699658).

The spelling of 51554143 in words is "fifty-one million, five hundred fifty-four thousand, one hundred forty-three".