51808295 has 32 divisors (see below), whose sum is σ = 79004160. Its totient is φ = 31674240.

The previous prime is 51808291. The next prime is 51808301. The reversal of 51808295 is 59280815.

It is not a de Polignac number, because 51808295 - 2² = 51808291 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51808291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19136 + ... + 21674.

It is an arithmetic number, because the mean of its divisors is an integer number (2468880).

Almost surely, 2^51808295 is an apocalyptic number.

51808295 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51808295 is a deficient number, since it is larger than the sum of its proper divisors (27195865).

51808295 is a wasteful number, since it uses less digits than its factorization.

51808295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615.

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 51808295 is about 7197.7979271441. The cubic root of 51808295 is about 372.7918707013.

The spelling of 51808295 in words is "fifty-one million, eight hundred eight thousand, two hundred ninety-five".