51494894 has 16 divisors (see below), whose sum is σ = 87171120. Its totient is φ = 22599360.

The previous prime is 51494879. The next prime is 51494897. The reversal of 51494894 is 49849415.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39719 + ... + 40994.

It is an arithmetic number, because the mean of its divisors is an integer number (5448195).

Almost surely, 2^51494894 is an apocalyptic number.

51494894 is a deficient number, since it is larger than the sum of its proper divisors (35676226).

51494894 is a wasteful number, since it uses less digits than its factorization.

51494894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80755.

The product of its digits is 207360, while the sum is 44.

The square root of 51494894 is about 7175.9942865083. The cubic root of 51494894 is about 372.0386468886.

The spelling of 51494894 in words is "fifty-one million, four hundred ninety-four thousand, eight hundred ninety-four".