30556161 has 12 divisors (see below), whose sum is σ = 46459920. Its totient is φ = 19298520.

The previous prime is 30556153. The next prime is 30556171. The reversal of 30556161 is 16165503.

It is a happy number.

It is not a de Polignac number, because 30556161 - 2³ = 30556153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30556151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89175 + ... + 89516.

It is an arithmetic number, because the mean of its divisors is an integer number (3871660).

It is a Proth number, since it is equal to 1865 ⋅ 2¹⁴ + 1 and 1865 < 2¹⁴.

Almost surely, 2^30556161 is an apocalyptic number.

It is an amenable number.

30556161 is a deficient number, since it is larger than the sum of its proper divisors (15903759).

30556161 is a wasteful number, since it uses less digits than its factorization.

30556161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178716 (or 178713 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 30556161 is about 5527.7627481649. The cubic root of 30556161 is about 312.6316407518.

It can be divided in two parts, 3055 and 6161, that added together give a square (9216 = 96²).

The spelling of 30556161 in words is "thirty million, five hundred fifty-six thousand, one hundred sixty-one".