51254551 has 16 divisors (see below), whose sum is σ = 54250560. Its totient is φ = 48372480.

The previous prime is 51254549. The next prime is 51254587. The reversal of 51254551 is 15545215.

It is a cyclic number.

It is not a de Polignac number, because 51254551 - 2¹ = 51254549 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 (51254521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223705 + ... + 223933.

It is an arithmetic number, because the mean of its divisors is an integer number (3390660).

Almost surely, 2^51254551 is an apocalyptic number.

51254551 is a deficient number, since it is larger than the sum of its proper divisors (2996009).

51254551 is a wasteful number, since it uses less digits than its factorization.

51254551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426.

The product of its digits is 5000, while the sum is 28.

The square root of 51254551 is about 7159.2283802097. The cubic root of 51254551 is about 371.4589366060.

Adding to 51254551 its reverse (15545215), we get a palindrome (66799766).

The spelling of 51254551 in words is "fifty-one million, two hundred fifty-four thousand, five hundred fifty-one".