51335251 has 16 divisors (see below), whose sum is σ = 57697920. Its totient is φ = 45277120.

The previous prime is 51335237. The next prime is 51335281. The reversal of 51335251 is 15253315.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51335251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51335281) 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, 53391 + ... + 54343.

It is an arithmetic number, because the mean of its divisors is an integer number (3606120).

Almost surely, 2^51335251 is an apocalyptic number.

51335251 is a deficient number, since it is larger than the sum of its proper divisors (6362669).

51335251 is a wasteful number, since it uses less digits than its factorization.

51335251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106.

The product of its digits is 2250, while the sum is 25.

The square root of 51335251 is about 7164.8622457100. The cubic root of 51335251 is about 371.6537877077.

Adding to 51335251 its reverse (15253315), we get a palindrome (66588566).

The spelling of 51335251 in words is "fifty-one million, three hundred thirty-five thousand, two hundred fifty-one".