215144023 has 2 divisors, whose sum is σ = 215144024. Its totient is φ = 215144022.

The previous prime is 215143991. The next prime is 215144029. The reversal of 215144023 is 320441512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215144023 - 2⁵ = 215143991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215143985 and 215144003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215144029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107572011 + 107572012.

It is an arithmetic number, because the mean of its divisors is an integer number (107572012).

Almost surely, 2^215144023 is an apocalyptic number.

215144023 is a deficient number, since it is larger than the sum of its proper divisors (1).

215144023 is an equidigital number, since it uses as much as digits as its factorization.

215144023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 215144023 is about 14667.7886199659. The cubic root of 215144023 is about 599.2063794439.

Adding to 215144023 its reverse (320441512), we get a palindrome (535585535).

The spelling of 215144023 in words is "two hundred fifteen million, one hundred forty-four thousand, twenty-three".