51494402 has 8 divisors (see below), whose sum is σ = 77325516. Its totient is φ = 25719232.

The previous prime is 51494393. The next prime is 51494413. The reversal of 51494402 is 20449415.

It can be written as a sum of positive squares in 2 ways, for example, as 47458321 + 4036081 = 6889^2 + 2009^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 11603 + ... + 15414.

Almost surely, 2^51494402 is an apocalyptic number.

51494402 is a deficient number, since it is larger than the sum of its proper divisors (25831114).

51494402 is a wasteful number, since it uses less digits than its factorization.

51494402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27972.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 51494402 is about 7175.9600054627. The cubic root of 51494402 is about 372.0374620229.

The spelling of 51494402 in words is "fifty-one million, four hundred ninety-four thousand, four hundred two".