51527197 has 4 divisors (see below), whose sum is σ = 52179520. Its totient is φ = 50874876.

The previous prime is 51527191. The next prime is 51527227. The reversal of 51527197 is 79172515.

51527197 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51527197 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 (51527191) 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, 326043 + ... + 326200.

It is an arithmetic number, because the mean of its divisors is an integer number (13044880).

Almost surely, 2^51527197 is an apocalyptic number.

It is an amenable number.

51527197 is a deficient number, since it is larger than the sum of its proper divisors (652323).

51527197 is an equidigital number, since it uses as much as digits as its factorization.

51527197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652322.

The product of its digits is 22050, while the sum is 37.

The square root of 51527197 is about 7178.2447018752. The cubic root of 51527197 is about 372.1164245178.

The spelling of 51527197 in words is "fifty-one million, five hundred twenty-seven thousand, one hundred ninety-seven".