285031 has 2 divisors, whose sum is σ = 285032. Its totient is φ = 285030.

The previous prime is 285023. The next prime is 285049. The reversal of 285031 is 130582.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 285031 - 2³ = 285023 is a prime.

It is a super-2 number, since 2×285031² = 162485341922, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142515 + 142516.

It is an arithmetic number, because the mean of its divisors is an integer number (142516).

2²⁸⁵⁰³¹ is an apocalyptic number.

285031 is a deficient number, since it is larger than the sum of its proper divisors (1).

285031 is an equidigital number, since it uses as much as digits as its factorization.

285031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 285031 is about 533.8829459722. The cubic root of 285031 is about 65.8108296030.

Subtracting from 285031 its reverse (130582), we obtain a square (154449 = 393²).

The spelling of 285031 in words is "two hundred eighty-five thousand, thirty-one".