30402155 has 16 divisors (see below), whose sum is σ = 41943744. Its totient is φ = 20722560.

The previous prime is 30402143. The next prime is 30402173. The reversal of 30402155 is 55120403.

It is not a de Polignac number, because 30402155 - 2⁴ = 30402139 is a prime.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 3545 + ... + 8565.

It is an arithmetic number, because the mean of its divisors is an integer number (2621484).

Almost surely, 2^30402155 is an apocalyptic number.

30402155 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

30402155 is a deficient number, since it is larger than the sum of its proper divisors (11541589).

30402155 is a wasteful number, since it uses less digits than its factorization.

30402155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5206.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 30402155 is about 5513.8149225378. The cubic root of 30402155 is about 312.1055246550.

Adding to 30402155 its reverse (55120403), we get a palindrome (85522558).

The spelling of 30402155 in words is "thirty million, four hundred two thousand, one hundred fifty-five".