285204327131 has 4 divisors (see below), whose sum is σ = 291272504352. Its totient is φ = 279136149912.

The previous prime is 285204327127. The next prime is 285204327157. The reversal of 285204327131 is 131723402582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 285204327131 - 2² = 285204327127 is a prime.

It is a super-2 number, since 2×285204327131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285204326131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3034088540 + ... + 3034088633.

It is an arithmetic number, because the mean of its divisors is an integer number (72818126088).

Almost surely, 2^285204327131 is an apocalyptic number.

285204327131 is a deficient number, since it is larger than the sum of its proper divisors (6068177221).

285204327131 is an equidigital number, since it uses as much as digits as its factorization.

285204327131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6068177220.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 285204327131 in words is "two hundred eighty-five billion, two hundred four million, three hundred twenty-seven thousand, one hundred thirty-one".