285021047131 has 2 divisors, whose sum is σ = 285021047132. Its totient is φ = 285021047130.

The previous prime is 285021047111. The next prime is 285021047183. The reversal of 285021047131 is 131740120582.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285021047131 is a prime.

It is a super-2 number, since 2×285021047131² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (285021047111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142510523565 + 142510523566.

It is an arithmetic number, because the mean of its divisors is an integer number (142510523566).

Almost surely, 2^285021047131 is an apocalyptic number.

285021047131 is a deficient number, since it is larger than the sum of its proper divisors (1).

285021047131 is an equidigital number, since it uses as much as digits as its factorization.

285021047131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 34.

The spelling of 285021047131 in words is "two hundred eighty-five billion, twenty-one million, forty-seven thousand, one hundred thirty-one".