51516245 has 8 divisors (see below), whose sum is σ = 67439520. Its totient is φ = 37466320.

The previous prime is 51516221. The next prime is 51516271. The reversal of 51516245 is 54261515.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51516245 - 2¹⁰ = 51515221 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468275 + ... + 468384.

It is an arithmetic number, because the mean of its divisors is an integer number (8429940).

Almost surely, 2^51516245 is an apocalyptic number.

51516245 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51516245 is a deficient number, since it is larger than the sum of its proper divisors (15923275).

51516245 is a wasteful number, since it uses less digits than its factorization.

51516245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936675.

The product of its digits is 6000, while the sum is 29.

The square root of 51516245 is about 7177.4818007432. The cubic root of 51516245 is about 372.0900584555.

The spelling of 51516245 in words is "fifty-one million, five hundred sixteen thousand, two hundred forty-five".