51552197 has 4 divisors (see below), whose sum is σ = 51569856. Its totient is φ = 51534540.

The previous prime is 51552191. The next prime is 51552217. The reversal of 51552197 is 79125515.

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 51552197 - 2⁶ = 51552133 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 (51552191) 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, 3293 + ... + 10674.

It is an arithmetic number, because the mean of its divisors is an integer number (12892464).

Almost surely, 2^51552197 is an apocalyptic number.

It is an amenable number.

51552197 is a deficient number, since it is larger than the sum of its proper divisors (17659).

51552197 is a wasteful number, since it uses less digits than its factorization.

51552197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17658.

The product of its digits is 15750, while the sum is 35.

The square root of 51552197 is about 7179.9858634958. The cubic root of 51552197 is about 372.1765960196.

The spelling of 51552197 in words is "fifty-one million, five hundred fifty-two thousand, one hundred ninety-seven".