51494187 has 16 divisors (see below), whose sum is σ = 71281152. Its totient is φ = 33042720.

The previous prime is 51494167. The next prime is 51494189. The reversal of 51494187 is 78149415.

It is not a de Polignac number, because 51494187 - 2⁷ = 51494059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51494189) 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, 5608 + ... + 11594.

It is an arithmetic number, because the mean of its divisors is an integer number (4455072).

Almost surely, 2^51494187 is an apocalyptic number.

51494187 is a deficient number, since it is larger than the sum of its proper divisors (19786965).

51494187 is a wasteful number, since it uses less digits than its factorization.

51494187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6098.

The product of its digits is 40320, while the sum is 39.

The square root of 51494187 is about 7175.9450248730. The cubic root of 51494187 is about 372.0369442439.

It can be divided in two parts, 51494 and 187, that added together give a triangular number (51681 = T₃₂₁).

The spelling of 51494187 in words is "fifty-one million, four hundred ninety-four thousand, one hundred eighty-seven".