51246113 has 4 divisors (see below), whose sum is σ = 51393300. Its totient is φ = 51098928.

The previous prime is 51246077. The next prime is 51246119. The reversal of 51246113 is 31164215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31164215 = 5 ⋅6232843.

It can be written as a sum of positive squares in 2 ways, for example, as 33547264 + 17698849 = 5792^2 + 4207^2 .

It is a cyclic number.

It is not a de Polignac number, because 51246113 - 2⁶ = 51246049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51246119) 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, 73070 + ... + 73767.

It is an arithmetic number, because the mean of its divisors is an integer number (12848325).

Almost surely, 2^51246113 is an apocalyptic number.

It is an amenable number.

51246113 is a deficient number, since it is larger than the sum of its proper divisors (147187).

51246113 is a wasteful number, since it uses less digits than its factorization.

51246113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147186.

The product of its digits is 720, while the sum is 23.

The square root of 51246113 is about 7158.6390466345. The cubic root of 51246113 is about 371.4385511477.

The spelling of 51246113 in words is "fifty-one million, two hundred forty-six thousand, one hundred thirteen".