51403684 has 12 divisors (see below), whose sum is σ = 90530524. Its totient is φ = 25537824.

The previous prime is 51403669. The next prime is 51403687. The reversal of 51403684 is 48630415.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 32741284 + 18662400 = 5722^2 + 4320^2 .

It is not an unprimeable number, because it can be changed into a prime (51403687) by changing a digit.

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, 40299 + ... + 41554.

Almost surely, 2^51403684 is an apocalyptic number.

It is an amenable number.

51403684 is a deficient number, since it is larger than the sum of its proper divisors (39126840).

51403684 is a wasteful number, since it uses less digits than its factorization.

51403684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82014 (or 82012 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 51403684 is about 7169.6362529769. The cubic root of 51403684 is about 371.8188600515.

The spelling of 51403684 in words is "fifty-one million, four hundred three thousand, six hundred eighty-four".