550148981 has 4 divisors (see below), whose sum is σ = 559473600. Its totient is φ = 540824364.

The previous prime is 550148941. The next prime is 550148999. The reversal of 550148981 is 189841055.

550148981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 550148981 - 2¹⁰ = 550147957 is a prime.

It is a super-2 number, since 2×550148981² = 605327802590676722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550148941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4662221 + ... + 4662338.

It is an arithmetic number, because the mean of its divisors is an integer number (139868400).

Almost surely, 2^550148981 is an apocalyptic number.

It is an amenable number.

550148981 is a deficient number, since it is larger than the sum of its proper divisors (9324619).

550148981 is an equidigital number, since it uses as much as digits as its factorization.

550148981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9324618.

The product of its (nonzero) digits is 57600, while the sum is 41.

The square root of 550148981 is about 23455.2548696449. The cubic root of 550148981 is about 819.3952416810.

The spelling of 550148981 in words is "five hundred fifty million, one hundred forty-eight thousand, nine hundred eighty-one".