215430023 has 2 divisors, whose sum is σ = 215430024. Its totient is φ = 215430022.

The previous prime is 215429971. The next prime is 215430053. The reversal of 215430023 is 320034512.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215430023 - 2¹⁰ = 215428999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215429977 and 215430004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215430053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107715011 + 107715012.

It is an arithmetic number, because the mean of its divisors is an integer number (107715012).

Almost surely, 2^215430023 is an apocalyptic number.

215430023 is a deficient number, since it is larger than the sum of its proper divisors (1).

215430023 is an equidigital number, since it uses as much as digits as its factorization.

215430023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 215430023 is about 14677.5346363073. The cubic root of 215430023 is about 599.4717786253.

Adding to 215430023 its reverse (320034512), we get a palindrome (535464535).

The spelling of 215430023 in words is "two hundred fifteen million, four hundred thirty thousand, twenty-three".