51552014221 has 8 divisors (see below), whose sum is σ = 51601435424. Its totient is φ = 51502618800.

The previous prime is 51552014209. The next prime is 51552014263. The reversal of 51552014221 is 12241025515.

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 51552014221 - 2⁷ = 51552014093 is a prime.

It is a super-2 number, since 2×51552014221² (a number of 22 digits) contains 22 as substring.

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 51552014221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51552014201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7870870 + ... + 7877416.

It is an arithmetic number, because the mean of its divisors is an integer number (6450179428).

Almost surely, 2^51552014221 is an apocalyptic number.

It is an amenable number.

51552014221 is a deficient number, since it is larger than the sum of its proper divisors (49421203).

51552014221 is a wasteful number, since it uses less digits than its factorization.

51552014221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12891.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 51552014221 its reverse (12241025515), we get a palindrome (63793039736).

The spelling of 51552014221 in words is "fifty-one billion, five hundred fifty-two million, fourteen thousand, two hundred twenty-one".