551220501 has 8 divisors (see below), whose sum is σ = 791496160. Its totient is φ = 339212592.

The previous prime is 551220497. The next prime is 551220503. The reversal of 551220501 is 105022155.

551220501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 551220501 - 2² = 551220497 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551220503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7066891 + ... + 7066968.

It is an arithmetic number, because the mean of its divisors is an integer number (98937020).

Almost surely, 2^551220501 is an apocalyptic number.

It is an amenable number.

551220501 is a deficient number, since it is larger than the sum of its proper divisors (240275659).

551220501 is a wasteful number, since it uses less digits than its factorization.

551220501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14133875.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 551220501 is about 23478.0855480169. The cubic root of 551220501 is about 819.9268728164.

Adding to 551220501 its reverse (105022155), we get a palindrome (656242656).

The spelling of 551220501 in words is "five hundred fifty-one million, two hundred twenty thousand, five hundred one".