285288131 has 2 divisors, whose sum is σ = 285288132. Its totient is φ = 285288130.

The previous prime is 285288119. The next prime is 285288163. The reversal of 285288131 is 131882582.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285288131 is a prime.

It is a super-2 number, since 2×285288131² = 162778635378946322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (285288331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142644065 + 142644066.

It is an arithmetic number, because the mean of its divisors is an integer number (142644066).

Almost surely, 2^285288131 is an apocalyptic number.

285288131 is a deficient number, since it is larger than the sum of its proper divisors (1).

285288131 is an equidigital number, since it uses as much as digits as its factorization.

285288131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 38.

The square root of 285288131 is about 16890.4745640849. The cubic root of 285288131 is about 658.3061332065.

The spelling of 285288131 in words is "two hundred eighty-five million, two hundred eighty-eight thousand, one hundred thirty-one".