30745155 has 32 divisors (see below), whose sum is σ = 56448000. Its totient is φ = 13997952.

The previous prime is 30745151. The next prime is 30745171. The reversal of 30745155 is 55154703.

It is not a de Polignac number, because 30745155 - 2² = 30745151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30745151) 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 31 ways as a sum of consecutive naturals, for example, 36226 + ... + 37064.

It is an arithmetic number, because the mean of its divisors is an integer number (1764000).

Almost surely, 2^30745155 is an apocalyptic number.

30745155 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

30745155 is a deficient number, since it is larger than the sum of its proper divisors (25702845).

30745155 is a wasteful number, since it uses less digits than its factorization.

30745155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203.

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 30745155 is about 5544.8313770574. The cubic root of 30745155 is about 313.2748727762.

Adding to 30745155 its reverse (55154703), we get a palindrome (85899858).

The spelling of 30745155 in words is "thirty million, seven hundred forty-five thousand, one hundred fifty-five".