51874642 has 4 divisors (see below), whose sum is σ = 77811966. Its totient is φ = 25937320.

The previous prime is 51874607. The next prime is 51874643. The reversal of 51874642 is 24647815.

51874642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 43178041 + 8696601 = 6571^2 + 2949^2 .

It is not an unprimeable number, because it can be changed into a prime (51874643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12968659 + ... + 12968662.

Almost surely, 2^51874642 is an apocalyptic number.

51874642 is a deficient number, since it is larger than the sum of its proper divisors (25937324).

51874642 is a wasteful number, since it uses less digits than its factorization.

51874642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25937323.

The product of its digits is 53760, while the sum is 37.

The square root of 51874642 is about 7202.4052926783. The cubic root of 51874642 is about 372.9509383537.

The spelling of 51874642 in words is "fifty-one million, eight hundred seventy-four thousand, six hundred forty-two".