4155231 has 4 divisors (see below), whose sum is σ = 5540312. Its totient is φ = 2770152.

The previous prime is 4155197. The next prime is 4155247. The reversal of 4155231 is 1325514.

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

It is not a de Polignac number, because 4155231 - 2⁷ = 4155103 is a prime.

It is a super-2 number, since 2×4155231² = 34531889326722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4155198 and 4155207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4155251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692536 + ... + 692541.

It is an arithmetic number, because the mean of its divisors is an integer number (1385078).

Almost surely, 2^4155231 is an apocalyptic number.

4155231 is a deficient number, since it is larger than the sum of its proper divisors (1385081).

4155231 is a wasteful number, since it uses less digits than its factorization.

4155231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385080.

The product of its digits is 600, while the sum is 21.

The square root of 4155231 is about 2038.4383728727. The cubic root of 4155231 is about 160.7675490195.

It can be divided in two parts, 4155 and 231, that multiplied together give a triangular number (959805 = T₁₃₈₅).

The spelling of 4155231 in words is "four million, one hundred fifty-five thousand, two hundred thirty-one".