51905404 has 12 divisors (see below), whose sum is σ = 90957384. Its totient is φ = 25917584.

The previous prime is 51905401. The next prime is 51905407. The reversal of 51905404 is 40450915.

It is an interprime number because it is at equal distance from previous prime (51905401) and next prime (51905407).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51905401) 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, 5302 + ... + 11485.

It is an arithmetic number, because the mean of its divisors is an integer number (7579782).

Almost surely, 2^51905404 is an apocalyptic number.

It is an amenable number.

51905404 is a deficient number, since it is larger than the sum of its proper divisors (39051980).

51905404 is a wasteful number, since it uses less digits than its factorization.

51905404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17564 (or 17562 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 51905404 is about 7204.5405127600. The cubic root of 51905404 is about 373.0246445633.

The spelling of 51905404 in words is "fifty-one million, nine hundred five thousand, four hundred four".