30750055 has 8 divisors (see below), whose sum is σ = 42171552. Its totient is φ = 21085728.

The previous prime is 30750053. The next prime is 30750073. The reversal of 30750055 is 55005703.

It is a happy number.

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 30750055 - 2¹ = 30750053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30750053) 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, 439252 + ... + 439321.

It is an arithmetic number, because the mean of its divisors is an integer number (5271444).

Almost surely, 2^30750055 is an apocalyptic number.

30750055 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

30750055 is a deficient number, since it is larger than the sum of its proper divisors (11421497).

30750055 is an equidigital number, since it uses as much as digits as its factorization.

30750055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878585.

The product of its (nonzero) digits is 2625, while the sum is 25.

The square root of 30750055 is about 5545.2732123855. The cubic root of 30750055 is about 313.2915145890.

Adding to 30750055 its reverse (55005703), we get a palindrome (85755758).

The spelling of 30750055 in words is "thirty million, seven hundred fifty thousand, fifty-five".