51154243 has 4 divisors (see below), whose sum is σ = 58462000. Its totient is φ = 43846488.

The previous prime is 51154217. The next prime is 51154261. The reversal of 51154243 is 34245115.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-51154243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51154273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3653868 + ... + 3653881.

It is an arithmetic number, because the mean of its divisors is an integer number (14615500).

Almost surely, 2^51154243 is an apocalyptic number.

51154243 is a deficient number, since it is larger than the sum of its proper divisors (7307757).

51154243 is an equidigital number, since it uses as much as digits as its factorization.

51154243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7307756.

The product of its digits is 2400, while the sum is 25.

The square root of 51154243 is about 7152.2194457385. The cubic root of 51154243 is about 371.2164564387.

Adding to 51154243 its reverse (34245115), we get a palindrome (85399358).

The spelling of 51154243 in words is "fifty-one million, one hundred fifty-four thousand, two hundred forty-three".