230215511 has 2 divisors, whose sum is σ = 230215512. Its totient is φ = 230215510.

The previous prime is 230215493. The next prime is 230215549. The reversal of 230215511 is 115512032.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230215511 is a prime.

It is a super-2 number, since 2×230215511² = 105998363009982242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230211511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115107755 + 115107756.

It is an arithmetic number, because the mean of its divisors is an integer number (115107756).

Almost surely, 2^230215511 is an apocalyptic number.

230215511 is a deficient number, since it is larger than the sum of its proper divisors (1).

230215511 is an equidigital number, since it uses as much as digits as its factorization.

230215511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 230215511 is about 15172.8544117447. The cubic root of 230215511 is about 612.8838729838.

Adding to 230215511 its reverse (115512032), we get a palindrome (345727543).

The spelling of 230215511 in words is "two hundred thirty million, two hundred fifteen thousand, five hundred eleven".