4155523 has 2 divisors, whose sum is σ = 4155524. Its totient is φ = 4155522.

The previous prime is 4155521. The next prime is 4155533. The reversal of 4155523 is 3255514.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4155523 - 2¹ = 4155521 is a prime.

Together with 4155521, it forms a pair of twin primes.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (4155521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2077761 + 2077762.

It is an arithmetic number, because the mean of its divisors is an integer number (2077762).

Almost surely, 2^4155523 is an apocalyptic number.

4155523 is a deficient number, since it is larger than the sum of its proper divisors (1).

4155523 is an equidigital number, since it uses as much as digits as its factorization.

4155523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3000, while the sum is 25.

The square root of 4155523 is about 2038.5099950699. The cubic root of 4155523 is about 160.7713147968.

Subtracting from 4155523 its reverse (3255514), we obtain a palindrome (900009).

The spelling of 4155523 in words is "four million, one hundred fifty-five thousand, five hundred twenty-three".