51469895 has 4 divisors (see below), whose sum is σ = 61763880. Its totient is φ = 41175912.

The previous prime is 51469823. The next prime is 51469907. The reversal of 51469895 is 59896415.

It is a happy number.

51469895 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 a de Polignac number, because none of the positive numbers 2^k-51469895 is a prime.

It is a super-2 number, since 2×51469895² = 5298300182622050, which contains 22 as substring.

It is a congruent 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, 5146985 + ... + 5146994.

It is an arithmetic number, because the mean of its divisors is an integer number (15440970).

Almost surely, 2^51469895 is an apocalyptic number.

51469895 is a deficient number, since it is larger than the sum of its proper divisors (10293985).

51469895 is a wasteful number, since it uses less digits than its factorization.

51469895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10293984.

The product of its digits is 388800, while the sum is 47.

The square root of 51469895 is about 7174.2522258421. The cubic root of 51469895 is about 371.9784331544.

The spelling of 51469895 in words is "fifty-one million, four hundred sixty-nine thousand, eight hundred ninety-five".