51516193 has 4 divisors (see below), whose sum is σ = 52714288. Its totient is φ = 50318100.

The previous prime is 51516187. The next prime is 51516221. The reversal of 51516193 is 39161515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51516193 - 2¹³ = 51508001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51516293) 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, 598983 + ... + 599068.

It is an arithmetic number, because the mean of its divisors is an integer number (13178572).

Almost surely, 2^51516193 is an apocalyptic number.

It is an amenable number.

51516193 is a deficient number, since it is larger than the sum of its proper divisors (1198095).

51516193 is a wasteful number, since it uses less digits than its factorization.

51516193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198094.

The product of its digits is 4050, while the sum is 31.

The square root of 51516193 is about 7177.4781783019. The cubic root of 51516193 is about 372.0899332608.

The spelling of 51516193 in words is "fifty-one million, five hundred sixteen thousand, one hundred ninety-three".