51947895 has 16 divisors (see below), whose sum is σ = 84256992. Its totient is φ = 27325440.

The previous prime is 51947893. The next prime is 51947899. The reversal of 51947895 is 59874915.

It is not a de Polignac number, because 51947895 - 2¹ = 51947893 is a prime.

It is a super-3 number, since 3×51947895³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51947891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22626 + ... + 24815.

It is an arithmetic number, because the mean of its divisors is an integer number (5266062).

Almost surely, 2^51947895 is an apocalyptic number.

51947895 is a deficient number, since it is larger than the sum of its proper divisors (32309097).

51947895 is a wasteful number, since it uses less digits than its factorization.

51947895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47522.

The product of its digits is 453600, while the sum is 48.

The square root of 51947895 is about 7207.4888137270. The cubic root of 51947895 is about 373.1264057533.

The spelling of 51947895 in words is "fifty-one million, nine hundred forty-seven thousand, eight hundred ninety-five".