51494895 has 24 divisors (see below), whose sum is σ = 89481600. Its totient is φ = 27395136.

The previous prime is 51494879. The next prime is 51494897. The reversal of 51494895 is 59849415.

51494895 is a `hidden beast` number, since 514 + 9 + 48 + 95 = 666.

It is not a de Polignac number, because 51494895 - 2⁴ = 51494879 is a prime.

It is a super-2 number, since 2×51494895² = 5303448422122050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 51494895.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51494897) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20361 + ... + 22749.

It is an arithmetic number, because the mean of its divisors is an integer number (3728400).

Almost surely, 2^51494895 is an apocalyptic number.

51494895 is a deficient number, since it is larger than the sum of its proper divisors (37986705).

51494895 is a wasteful number, since it uses less digits than its factorization.

51494895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2879 (or 2876 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 51494895 is about 7175.9943561851. The cubic root of 51494895 is about 372.0386492969.

The spelling of 51494895 in words is "fifty-one million, four hundred ninety-four thousand, eight hundred ninety-five".