30705161 has 4 divisors (see below), whose sum is σ = 32040192. Its totient is φ = 29370132.

The previous prime is 30705149. The next prime is 30705163. The reversal of 30705161 is 16150703.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30705161 - 2¹⁰ = 30704137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 1335007 = 30705161 / (3 + 0 + 7 + 0 + 5 + 1 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30705163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 667481 + ... + 667526.

It is an arithmetic number, because the mean of its divisors is an integer number (8010048).

Almost surely, 2^30705161 is an apocalyptic number.

It is an amenable number.

30705161 is a deficient number, since it is larger than the sum of its proper divisors (1335031).

30705161 is a wasteful number, since it uses less digits than its factorization.

30705161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335030.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 30705161 is about 5541.2237818013. The cubic root of 30705161 is about 313.1389754627.

Adding to 30705161 its reverse (16150703), we get a palindrome (46855864).

The spelling of 30705161 in words is "thirty million, seven hundred five thousand, one hundred sixty-one".