51361404 has 12 divisors (see below), whose sum is σ = 119843304. Its totient is φ = 17120464.

The previous prime is 51361379. The next prime is 51361411. The reversal of 51361404 is 40416315.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2140047 + ... + 2140070.

It is an arithmetic number, because the mean of its divisors is an integer number (9986942).

Almost surely, 2^51361404 is an apocalyptic number.

It is an amenable number.

51361404 is an abundant number, since it is smaller than the sum of its proper divisors (68481900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51361404 is a wasteful number, since it uses less digits than its factorization.

51361404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4280124 (or 4280122 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 51361404 is about 7166.6871007461. The cubic root of 51361404 is about 371.7168906190.

Adding to 51361404 its reverse (40416315), we get a palindrome (91777719).

The spelling of 51361404 in words is "fifty-one million, three hundred sixty-one thousand, four hundred four".