215416423 has 2 divisors, whose sum is σ = 215416424. Its totient is φ = 215416422.

The previous prime is 215416387. The next prime is 215416447. The reversal of 215416423 is 324614512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215416423 - 2⁹ = 215415911 is a prime.

It is a super-2 number, since 2×215416423² = 92808470596229858, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 215416391 and 215416400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215416723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107708211 + 107708212.

It is an arithmetic number, because the mean of its divisors is an integer number (107708212).

Almost surely, 2^215416423 is an apocalyptic number.

215416423 is a deficient number, since it is larger than the sum of its proper divisors (1).

215416423 is an equidigital number, since it uses as much as digits as its factorization.

215416423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 28.

The square root of 215416423 is about 14677.0713359307. The cubic root of 215416423 is about 599.4591635657.

The spelling of 215416423 in words is "two hundred fifteen million, four hundred sixteen thousand, four hundred twenty-three".