30071961 has 12 divisors (see below), whose sum is σ = 43497792. Its totient is φ = 20020056.

The previous prime is 30071959. The next prime is 30071969. The reversal of 30071961 is 16917003.

It is not a de Polignac number, because 30071961 - 2¹ = 30071959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30071969) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6100 + ... + 9866.

It is an arithmetic number, because the mean of its divisors is an integer number (3624816).

Almost surely, 2^30071961 is an apocalyptic number.

It is an amenable number.

30071961 is a deficient number, since it is larger than the sum of its proper divisors (13425831).

30071961 is a wasteful number, since it uses less digits than its factorization.

30071961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4660 (or 4657 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 30071961 is about 5483.7907509313. The cubic root of 30071961 is about 310.9714961659.

Adding to 30071961 its reverse (16917003), we get a palindrome (46988964).

The spelling of 30071961 in words is "thirty million, seventy-one thousand, nine hundred sixty-one".