30321261 has 6 divisors (see below), whose sum is σ = 43797390. Its totient is φ = 20214168.

The previous prime is 30321259. The next prime is 30321271. The reversal of 30321261 is 16212303.

It can be written as a sum of positive squares in only one way, i.e., 20304036 + 10017225 = 4506^2 + 3165^2 .

It is not a de Polignac number, because 30321261 - 2¹ = 30321259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30321271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1684506 + ... + 1684523.

It is an arithmetic number, because the mean of its divisors is an integer number (7299565).

Almost surely, 2^30321261 is an apocalyptic number.

It is an amenable number.

30321261 is a deficient number, since it is larger than the sum of its proper divisors (13476129).

30321261 is a wasteful number, since it uses less digits than its factorization.

30321261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3369035 (or 3369032 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 30321261 is about 5506.4744619402. The cubic root of 30321261 is about 311.8284621652.

Adding to 30321261 its reverse (16212303), we get a palindrome (46533564).

The spelling of 30321261 in words is "thirty million, three hundred twenty-one thousand, two hundred sixty-one".