51000253 has 4 divisors (see below), whose sum is σ = 51505308. Its totient is φ = 50495200.

The previous prime is 51000233. The next prime is 51000343. The reversal of 51000253 is 35200015.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27594009 + 23406244 = 5253^2 + 4838^2 .

It is a cyclic number.

It is not a de Polignac number, because 51000253 - 2²⁵ = 17445821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51000203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252376 + ... + 252577.

It is an arithmetic number, because the mean of its divisors is an integer number (12876327).

Almost surely, 2^51000253 is an apocalyptic number.

It is an amenable number.

51000253 is a deficient number, since it is larger than the sum of its proper divisors (505055).

51000253 is a wasteful number, since it uses less digits than its factorization.

51000253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505054.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 51000253 is about 7141.4461420639. The cubic root of 51000253 is about 370.8435901496.

Adding to 51000253 its reverse (35200015), we get a palindrome (86200268).

The spelling of 51000253 in words is "fifty-one million, two hundred fifty-three", and thus it is an aban number.