215510343345623 has 2 divisors, whose sum is σ = 215510343345624. Its totient is φ = 215510343345622.

The previous prime is 215510343345607. The next prime is 215510343345637. The reversal of 215510343345623 is 326543343015512.

215510343345623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215510343345623 - 2⁴ = 215510343345607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215510343345223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107755171672811 + 107755171672812.

It is an arithmetic number, because the mean of its divisors is an integer number (107755171672812).

Almost surely, 2^{215510343345623} is an apocalyptic number.

215510343345623 is a deficient number, since it is larger than the sum of its proper divisors (1).

215510343345623 is an equidigital number, since it uses as much as digits as its factorization.

215510343345623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888000, while the sum is 47.

The spelling of 215510343345623 in words is "two hundred fifteen trillion, five hundred ten billion, three hundred forty-three million, three hundred forty-five thousand, six hundred twenty-three".