30520261 has 2 divisors, whose sum is σ = 30520262. Its totient is φ = 30520260.

The previous prime is 30520247. The next prime is 30520331. The reversal of 30520261 is 16202503.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29268100 + 1252161 = 5410^2 + 1119^2 .

It is a cyclic number.

It is not a de Polignac number, because 30520261 - 2⁵ = 30520229 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30520561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15260130 + 15260131.

It is an arithmetic number, because the mean of its divisors is an integer number (15260131).

Almost surely, 2^30520261 is an apocalyptic number.

It is an amenable number.

30520261 is a deficient number, since it is larger than the sum of its proper divisors (1).

30520261 is an equidigital number, since it uses as much as digits as its factorization.

30520261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 30520261 is about 5524.5145488088. The cubic root of 30520261 is about 312.5091572783.

Adding to 30520261 its reverse (16202503), we get a palindrome (46722764).

The spelling of 30520261 in words is "thirty million, five hundred twenty thousand, two hundred sixty-one".