285214261 has 2 divisors, whose sum is σ = 285214262. Its totient is φ = 285214260.

The previous prime is 285214249. The next prime is 285214271. The reversal of 285214261 is 162412582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243547236 + 41667025 = 15606^2 + 6455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285214261 is a prime.

It is a super-2 number, since 2×285214261² = 162694349355552242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285214271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142607130 + 142607131.

It is an arithmetic number, because the mean of its divisors is an integer number (142607131).

Almost surely, 2^285214261 is an apocalyptic number.

It is an amenable number.

285214261 is a deficient number, since it is larger than the sum of its proper divisors (1).

285214261 is an equidigital number, since it uses as much as digits as its factorization.

285214261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 31.

The square root of 285214261 is about 16888.2876870333. The cubic root of 285214261 is about 658.2493096346.

The spelling of 285214261 in words is "two hundred eighty-five million, two hundred fourteen thousand, two hundred sixty-one".