51195715 has 4 divisors (see below), whose sum is σ = 61434864. Its totient is φ = 40956568.

The previous prime is 51195707. The next prime is 51195731. The reversal of 51195715 is 51759115.

It is a happy number.

51195715 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.

It is a cyclic number.

It is not a de Polignac number, because 51195715 - 2³ = 51195707 is a prime.

It is a super-2 number, since 2×51195715² = 5242002468722450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 5119567 + ... + 5119576.

It is an arithmetic number, because the mean of its divisors is an integer number (15358716).

Almost surely, 2^51195715 is an apocalyptic number.

51195715 is a deficient number, since it is larger than the sum of its proper divisors (10239149).

51195715 is a wasteful number, since it uses less digits than its factorization.

51195715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10239148.

The product of its digits is 7875, while the sum is 34.

The square root of 51195715 is about 7155.1180982567. The cubic root of 51195715 is about 371.3167474374.

The spelling of 51195715 in words is "fifty-one million, one hundred ninety-five thousand, seven hundred fifteen".