51311895 has 8 divisors (see below), whose sum is σ = 82099056. Its totient is φ = 27366336.

The previous prime is 51311893. The next prime is 51311903. The reversal of 51311895 is 59811315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51311895 - 2¹ = 51311893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51311891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1710382 + ... + 1710411.

It is an arithmetic number, because the mean of its divisors is an integer number (10262382).

Almost surely, 2^51311895 is an apocalyptic number.

51311895 is a deficient number, since it is larger than the sum of its proper divisors (30787161).

51311895 is a wasteful number, since it uses less digits than its factorization.

51311895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3420801.

The product of its digits is 5400, while the sum is 33.

The square root of 51311895 is about 7163.2321615316. The cubic root of 51311895 is about 371.5974153810.

The spelling of 51311895 in words is "fifty-one million, three hundred eleven thousand, eight hundred ninety-five".