51463621 has 8 divisors (see below), whose sum is σ = 56210688. Its totient is φ = 46728000.

The previous prime is 51463619. The next prime is 51463649. The reversal of 51463621 is 12636415.

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

It is not a de Polignac number, because 51463621 - 2¹ = 51463619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51463621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51463691) 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 7 ways as a sum of consecutive naturals, for example, 8541 + ... + 13261.

It is an arithmetic number, because the mean of its divisors is an integer number (7026336).

Almost surely, 2^51463621 is an apocalyptic number.

It is an amenable number.

51463621 is a deficient number, since it is larger than the sum of its proper divisors (4747067).

51463621 is a wasteful number, since it uses less digits than its factorization.

51463621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5723.

The product of its digits is 4320, while the sum is 28.

The square root of 51463621 is about 7173.8149544019. The cubic root of 51463621 is about 371.9633182507.

The spelling of 51463621 in words is "fifty-one million, four hundred sixty-three thousand, six hundred twenty-one".