51416405 has 8 divisors (see below), whose sum is σ = 61738200. Its totient is φ = 41107456.

The previous prime is 51416353. The next prime is 51416423. The reversal of 51416405 is 50461415.

It can be written as a sum of positive squares in 4 ways, for example, as 12453841 + 38962564 = 3529^2 + 6242^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51416405 - 2⁶ = 51416341 is a prime.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 13781 + ... + 17109.

It is an arithmetic number, because the mean of its divisors is an integer number (7717275).

Almost surely, 2^51416405 is an apocalyptic number.

It is an amenable number.

51416405 is a deficient number, since it is larger than the sum of its proper divisors (10321795).

51416405 is a wasteful number, since it uses less digits than its factorization.

51416405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6423.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 51416405 is about 7170.5233421278. The cubic root of 51416405 is about 371.8495291737.

The spelling of 51416405 in words is "fifty-one million, four hundred sixteen thousand, four hundred five".