30155071 has 4 divisors (see below), whose sum is σ = 31742200. Its totient is φ = 28567944.

The previous prime is 30155057. The next prime is 30155087. The reversal of 30155071 is 17055103.

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

It is not a de Polignac number, because 30155071 - 2⁹ = 30154559 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 (30155171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 793536 + ... + 793573.

It is an arithmetic number, because the mean of its divisors is an integer number (7935550).

Almost surely, 2^30155071 is an apocalyptic number.

30155071 is a deficient number, since it is larger than the sum of its proper divisors (1587129).

30155071 is a wasteful number, since it uses less digits than its factorization.

30155071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587128.

The product of its (nonzero) digits is 525, while the sum is 22.

The square root of 30155071 is about 5491.3633097802. The cubic root of 30155071 is about 311.2577103836.

The spelling of 30155071 in words is "thirty million, one hundred fifty-five thousand, seventy-one".