550100721 has 8 divisors (see below), whose sum is σ = 733688064. Its totient is φ = 366623600.

The previous prime is 550100693. The next prime is 550100767. The reversal of 550100721 is 127001055.

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 550100721 - 2⁵ = 550100689 is a prime.

It is a super-2 number, since 2×550100721² = 605221606489439682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (550104721) 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, 15105 + ... + 36446.

It is an arithmetic number, because the mean of its divisors is an integer number (91711008).

Almost surely, 2^550100721 is an apocalyptic number.

It is an amenable number.

550100721 is a deficient number, since it is larger than the sum of its proper divisors (183587343).

550100721 is a wasteful number, since it uses less digits than its factorization.

550100721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55111.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 550100721 is about 23454.2260797495. The cubic root of 550100721 is about 819.3712814011.

Adding to 550100721 its reverse (127001055), we get a palindrome (677101776).

The spelling of 550100721 in words is "five hundred fifty million, one hundred thousand, seven hundred twenty-one".