4155215 has 4 divisors (see below), whose sum is σ = 4986264. Its totient is φ = 3324168.

The previous prime is 4155197. The next prime is 4155247. The reversal of 4155215 is 5125514.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4155215 - 2⁸ = 4154959 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415517 + ... + 415526.

It is an arithmetic number, because the mean of its divisors is an integer number (1246566).

Almost surely, 2^4155215 is an apocalyptic number.

4155215 is a deficient number, since it is larger than the sum of its proper divisors (831049).

4155215 is an equidigital number, since it uses as much as digits as its factorization.

4155215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831048.

The product of its digits is 1000, while the sum is 23.

The square root of 4155215 is about 2038.4344482960. The cubic root of 4155215 is about 160.7673426704.

Subtracting 4155215 from its reverse (5125514), we obtain a cube (970299 = 99³).

The spelling of 4155215 in words is "four million, one hundred fifty-five thousand, two hundred fifteen".