51145254 has 24 divisors (see below), whose sum is σ = 112471320. Its totient is φ = 16793568.

The previous prime is 51145249. The next prime is 51145309. The reversal of 51145254 is 45254115.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 19999 + ... + 22410.

It is an arithmetic number, because the mean of its divisors is an integer number (4686305).

Almost surely, 2^51145254 is an apocalyptic number.

51145254 is an abundant number, since it is smaller than the sum of its proper divisors (61326066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51145254 is a wasteful number, since it uses less digits than its factorization.

51145254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42484 (or 42481 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 51145254 is about 7151.5910117959. The cubic root of 51145254 is about 371.1947113529.

Adding to 51145254 its reverse (45254115), we get a palindrome (96399369).

The spelling of 51145254 in words is "fifty-one million, one hundred forty-five thousand, two hundred fifty-four".