30990055 has 8 divisors (see below), whose sum is σ = 38095344. Its totient is φ = 24187200.

The previous prime is 30990019. The next prime is 30990077. The reversal of 30990055 is 55009903.

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

It is not a de Polignac number, because 30990055 - 2¹¹ = 30988007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30989999 and 30990026.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75381 + ... + 75790.

It is an arithmetic number, because the mean of its divisors is an integer number (4761918).

Almost surely, 2^30990055 is an apocalyptic number.

30990055 is a deficient number, since it is larger than the sum of its proper divisors (7105289).

30990055 is a wasteful number, since it uses less digits than its factorization.

30990055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151217.

The product of its (nonzero) digits is 6075, while the sum is 31.

The square root of 30990055 is about 5566.8712038272. The cubic root of 30990055 is about 314.1044691403.

Adding to 30990055 its reverse (55009903), we get a palindrome (85999958).

The spelling of 30990055 in words is "thirty million, nine hundred ninety thousand, fifty-five".