51804461 has 4 divisors (see below), whose sum is σ = 52036992. Its totient is φ = 51571932.

The previous prime is 51804439. The next prime is 51804463. The reversal of 51804461 is 16440815.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16440815 = 5 ⋅3288163.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51804461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51804463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115931 + ... + 116376.

It is an arithmetic number, because the mean of its divisors is an integer number (13009248).

Almost surely, 2^51804461 is an apocalyptic number.

It is an amenable number.

51804461 is a deficient number, since it is larger than the sum of its proper divisors (232531).

51804461 is a wasteful number, since it uses less digits than its factorization.

51804461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232530.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 51804461 is about 7197.5315907608. The cubic root of 51804461 is about 372.7826744951.

The spelling of 51804461 in words is "fifty-one million, eight hundred four thousand, four hundred sixty-one".