30551121 has 8 divisors (see below), whose sum is σ = 45260960. Its totient is φ = 20367396.

The previous prime is 30551051. The next prime is 30551141. The reversal of 30551121 is 12115503.

It is not a de Polignac number, because 30551121 - 2¹⁹ = 30026833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30551094 and 30551103.

It is not an unprimeable number, because it can be changed into a prime (30551141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 565735 + ... + 565788.

It is an arithmetic number, because the mean of its divisors is an integer number (5657620).

Almost surely, 2^30551121 is an apocalyptic number.

It is an amenable number.

30551121 is a deficient number, since it is larger than the sum of its proper divisors (14709839).

30551121 is a wasteful number, since it uses less digits than its factorization.

30551121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131532 (or 1131526 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 30551121 is about 5527.3068487284. The cubic root of 30551121 is about 312.6144510912.

Adding to 30551121 its reverse (12115503), we get a palindrome (42666624).

The spelling of 30551121 in words is "thirty million, five hundred fifty-one thousand, one hundred twenty-one".