51402874 has 8 divisors (see below), whose sum is σ = 77812020. Its totient is φ = 25465536.

The previous prime is 51402863. The next prime is 51402881. The reversal of 51402874 is 47820415.

51402874 = 632² + 633² + ... + 740².

It can be written as a sum of positive squares in 2 ways, for example, as 51194025 + 208849 = 7155^2 + 457^2 .

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, 117679 + ... + 118114.

Almost surely, 2^51402874 is an apocalyptic number.

51402874 is a deficient number, since it is larger than the sum of its proper divisors (26409146).

51402874 is a wasteful number, since it uses less digits than its factorization.

51402874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235904.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 51402874 is about 7169.5797645329. The cubic root of 51402874 is about 371.8169070471.

The spelling of 51402874 in words is "fifty-one million, four hundred two thousand, eight hundred seventy-four".