51551241 has 16 divisors (see below), whose sum is σ = 81264000. Its totient is φ = 28441728.

The previous prime is 51551221. The next prime is 51551243. The reversal of 51551241 is 14215515.

It is not a de Polignac number, because 51551241 - 2⁷ = 51551113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51551243) 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, 41716 + ... + 42933.

It is an arithmetic number, because the mean of its divisors is an integer number (5079000).

Almost surely, 2^51551241 is an apocalyptic number.

It is an amenable number.

51551241 is a deficient number, since it is larger than the sum of its proper divisors (29712759).

51551241 is a wasteful number, since it uses less digits than its factorization.

51551241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84688.

The product of its digits is 1000, while the sum is 24.

The square root of 51551241 is about 7179.9192892400. The cubic root of 51551241 is about 372.1742954192.

Adding to 51551241 its reverse (14215515), we get a palindrome (65766756).

The spelling of 51551241 in words is "fifty-one million, five hundred fifty-one thousand, two hundred forty-one".