288021131 has 2 divisors, whose sum is σ = 288021132. Its totient is φ = 288021130.

The previous prime is 288021121. The next prime is 288021161. The reversal of 288021131 is 131120882.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-288021131 is a prime.

It is a super-2 number, since 2×288021131² = 165912343805038322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 288021131.

It is not a weakly prime, because it can be changed into another prime (288021101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144010565 + 144010566.

It is an arithmetic number, because the mean of its divisors is an integer number (144010566).

Almost surely, 2^288021131 is an apocalyptic number.

288021131 is a deficient number, since it is larger than the sum of its proper divisors (1).

288021131 is an equidigital number, since it uses as much as digits as its factorization.

288021131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 288021131 is about 16971.1853151157. The cubic root of 288021131 is about 660.4016005471.

The spelling of 288021131 in words is "two hundred eighty-eight million, twenty-one thousand, one hundred thirty-one".