51009253 has 4 divisors (see below), whose sum is σ = 51134380. Its totient is φ = 50884128.

The previous prime is 51009251. The next prime is 51009263. The reversal of 51009253 is 35290015.

51009253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 46485124 + 4524129 = 6818^2 + 2127^2 .

It is a cyclic number.

It is not a de Polignac number, because 51009253 - 2¹ = 51009251 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 (51009251) 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 3 ways as a sum of consecutive naturals, for example, 61950 + ... + 62767.

It is an arithmetic number, because the mean of its divisors is an integer number (12783595).

Almost surely, 2^51009253 is an apocalyptic number.

It is an amenable number.

51009253 is a deficient number, since it is larger than the sum of its proper divisors (125127).

51009253 is a wasteful number, since it uses less digits than its factorization.

51009253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125126.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 51009253 is about 7142.0762387418. The cubic root of 51009253 is about 370.8654030872.

Adding to 51009253 its reverse (35290015), we get a palindrome (86299268).

The spelling of 51009253 in words is "fifty-one million, nine thousand, two hundred fifty-three".