51530195 has 4 divisors (see below), whose sum is σ = 61836240. Its totient is φ = 41224152.

The previous prime is 51530191. The next prime is 51530197. The reversal of 51530195 is 59103515.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51530195 - 2² = 51530191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51530191) 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, 5153015 + ... + 5153024.

It is an arithmetic number, because the mean of its divisors is an integer number (15459060).

Almost surely, 2^51530195 is an apocalyptic number.

51530195 is a deficient number, since it is larger than the sum of its proper divisors (10306045).

51530195 is a wasteful number, since it uses less digits than its factorization.

51530195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10306044.

The product of its (nonzero) digits is 3375, while the sum is 29.

The square root of 51530195 is about 7178.4535242627. The cubic root of 51530195 is about 372.1236413112.

The spelling of 51530195 in words is "fifty-one million, five hundred thirty thousand, one hundred ninety-five".