30280055 has 16 divisors (see below), whose sum is σ = 39325440. Its totient is φ = 22249728.

The previous prime is 30280051. The next prime is 30280057. The reversal of 30280055 is 55008203.

It is a cyclic number.

It is not a de Polignac number, because 30280055 - 2² = 30280051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30280055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30280051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13451 + ... + 15539.

It is an arithmetic number, because the mean of its divisors is an integer number (2457840).

Almost surely, 2^30280055 is an apocalyptic number.

30280055 is a deficient number, since it is larger than the sum of its proper divisors (9045385).

30280055 is a wasteful number, since it uses less digits than its factorization.

30280055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2330.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 30280055 is about 5502.7315943993. The cubic root of 30280055 is about 311.6871418706.

Adding to 30280055 its reverse (55008203), we get a palindrome (85288258).

The spelling of 30280055 in words is "thirty million, two hundred eighty thousand, fifty-five".