905231 has 4 divisors (see below), whose sum is σ = 934464. Its totient is φ = 876000.

The previous prime is 905227. The next prime is 905249. The reversal of 905231 is 132509.

905231 = T₂₂₆ + T₂₂₇ + ... + T₂₅₆.

905231 = 89² + 90² + ... + 150².

905231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132509 = 13 ⋅10193.

It is a cyclic number.

It is not a de Polignac number, because 905231 - 2² = 905227 is a prime.

It is a super-2 number, since 2×905231² = 1638886326722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (905291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14570 + ... + 14631.

It is an arithmetic number, because the mean of its divisors is an integer number (233616).

2⁹⁰⁵²³¹ is an apocalyptic number.

905231 is a deficient number, since it is larger than the sum of its proper divisors (29233).

905231 is a wasteful number, since it uses less digits than its factorization.

905231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29232.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 905231 is about 951.4362826800. The cubic root of 905231 is about 96.7356318538.

The spelling of 905231 in words is "nine hundred five thousand, two hundred thirty-one".