51045251 has 8 divisors (see below), whose sum is σ = 52992000. Its totient is φ = 49117320.

The previous prime is 51045209. The next prime is 51045301. The reversal of 51045251 is 15254015.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51045251 - 2⁶ = 51045187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51045551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950 + ... + 10148.

It is an arithmetic number, because the mean of its divisors is an integer number (6624000).

Almost surely, 2^51045251 is an apocalyptic number.

51045251 is a deficient number, since it is larger than the sum of its proper divisors (1946749).

51045251 is a wasteful number, since it uses less digits than its factorization.

51045251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9409.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 51045251 is about 7144.5959297920. The cubic root of 51045251 is about 370.9526243441.

Adding to 51045251 its reverse (15254015), we get a palindrome (66299266).

The spelling of 51045251 in words is "fifty-one million, forty-five thousand, two hundred fifty-one".