30032155 has 4 divisors (see below), whose sum is σ = 36038592. Its totient is φ = 24025720.

The previous prime is 30032153. The next prime is 30032159. The reversal of 30032155 is 55123003.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 30032155 - 2¹ = 30032153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30032153) 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 3 ways as a sum of consecutive naturals, for example, 3003211 + ... + 3003220.

It is an arithmetic number, because the mean of its divisors is an integer number (9009648).

Almost surely, 2^30032155 is an apocalyptic number.

30032155 is a deficient number, since it is larger than the sum of its proper divisors (6006437).

30032155 is an equidigital number, since it uses as much as digits as its factorization.

30032155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6006436.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 30032155 is about 5480.1601253978. The cubic root of 30032155 is about 310.8342254684.

Adding to 30032155 its reverse (55123003), we get a palindrome (85155158).

The spelling of 30032155 in words is "thirty million, thirty-two thousand, one hundred fifty-five".