51462251 has 2 divisors, whose sum is σ = 51462252. Its totient is φ = 51462250.

The previous prime is 51462239. The next prime is 51462253. The reversal of 51462251 is 15226415.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51462251 is a prime.

Together with 51462253, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51462251.

It is not a weakly prime, because it can be changed into another prime (51462253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25731125 + 25731126.

It is an arithmetic number, because the mean of its divisors is an integer number (25731126).

Almost surely, 2^51462251 is an apocalyptic number.

51462251 is a deficient number, since it is larger than the sum of its proper divisors (1).

51462251 is an equidigital number, since it uses as much as digits as its factorization.

51462251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 26.

The square root of 51462251 is about 7173.7194676123. The cubic root of 51462251 is about 371.9600175744.

Adding to 51462251 its reverse (15226415), we get a palindrome (66688666).

The spelling of 51462251 in words is "fifty-one million, four hundred sixty-two thousand, two hundred fifty-one".