551221701 has 8 divisors (see below), whose sum is σ = 742098240. Its totient is φ = 363913152.

The previous prime is 551221691. The next prime is 551221721. The reversal of 551221701 is 107122155.

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

It is not a de Polignac number, because 551221701 - 2⁶ = 551221637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551221721) 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, 891636 + ... + 892253.

It is an arithmetic number, because the mean of its divisors is an integer number (92762280).

Almost surely, 2^551221701 is an apocalyptic number.

It is an amenable number.

551221701 is a deficient number, since it is larger than the sum of its proper divisors (190876539).

551221701 is a wasteful number, since it uses less digits than its factorization.

551221701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783995.

The product of its (nonzero) digits is 700, while the sum is 24.

The square root of 551221701 is about 23478.1111037494. Note that the first 4 decimals coincide. The cubic root of 551221701 is about 819.9274678061.

Adding to 551221701 its reverse (107122155), we get a palindrome (658343856).

The spelling of 551221701 in words is "five hundred fifty-one million, two hundred twenty-one thousand, seven hundred one".