30655231 has 2 divisors, whose sum is σ = 30655232. Its totient is φ = 30655230.

The previous prime is 30655223. The next prime is 30655241. The reversal of 30655231 is 13255603.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30655231 - 2³ = 30655223 is a prime.

It is a super-2 number, since 2×30655231² = 1879486375326722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30655196 and 30655205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30655241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15327615 + 15327616.

It is an arithmetic number, because the mean of its divisors is an integer number (15327616).

Almost surely, 2^30655231 is an apocalyptic number.

30655231 is a deficient number, since it is larger than the sum of its proper divisors (1).

30655231 is an equidigital number, since it uses as much as digits as its factorization.

30655231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 30655231 is about 5536.7166263048. The cubic root of 30655231 is about 312.9691504673.

The spelling of 30655231 in words is "thirty million, six hundred fifty-five thousand, two hundred thirty-one".