51262251 has 8 divisors (see below), whose sum is σ = 70554624. Its totient is φ = 33072360.

The previous prime is 51262229. The next prime is 51262261. The reversal of 51262251 is 15226215.

It is a happy number.

51262251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51262251 - 2⁶ = 51262187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51262261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275511 + ... + 275696.

It is an arithmetic number, because the mean of its divisors is an integer number (8819328).

Almost surely, 2^51262251 is an apocalyptic number.

51262251 is a deficient number, since it is larger than the sum of its proper divisors (19292373).

51262251 is a wasteful number, since it uses less digits than its factorization.

51262251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551241.

The product of its digits is 1200, while the sum is 24.

The square root of 51262251 is about 7159.7661274653. The cubic root of 51262251 is about 371.4775371695.

Adding to 51262251 its reverse (15226215), we get a palindrome (66488466).

The spelling of 51262251 in words is "fifty-one million, two hundred sixty-two thousand, two hundred fifty-one".