287220874060511 has 4 divisors (see below), whose sum is σ = 287796466995000. Its totient is φ = 286645281126024.

The previous prime is 287220874060499. The next prime is 287220874060567. The reversal of 287220874060511 is 115060478022782.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287220874060511 is a prime.

It is a super-2 number, since 2×287220874060511² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287220874063511) 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, 287796466496 + ... + 287796467493.

It is an arithmetic number, because the mean of its divisors is an integer number (71949116748750).

Almost surely, 2^{287220874060511} is an apocalyptic number.

287220874060511 is a deficient number, since it is larger than the sum of its proper divisors (575592934489).

287220874060511 is an equidigital number, since it uses as much as digits as its factorization.

287220874060511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575592934488.

The product of its (nonzero) digits is 3010560, while the sum is 53.

The spelling of 287220874060511 in words is "two hundred eighty-seven trillion, two hundred twenty billion, eight hundred seventy-four million, sixty thousand, five hundred eleven".