51548221 has 8 divisors (see below), whose sum is σ = 54025920. Its totient is φ = 49090272.

The previous prime is 51548219. The next prime is 51548239. The reversal of 51548221 is 12284515.

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 51548221 - 2¹ = 51548219 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 51548221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51548251) 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, 550 + ... + 10168.

It is an arithmetic number, because the mean of its divisors is an integer number (6753240).

Almost surely, 2^51548221 is an apocalyptic number.

It is an amenable number.

51548221 is a deficient number, since it is larger than the sum of its proper divisors (2477699).

51548221 is a wasteful number, since it uses less digits than its factorization.

51548221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9875.

The product of its digits is 3200, while the sum is 28.

The square root of 51548221 is about 7179.7089773890. The cubic root of 51548221 is about 372.1670276451.

The spelling of 51548221 in words is "fifty-one million, five hundred forty-eight thousand, two hundred twenty-one".