1002223871 has 4 divisors (see below), whose sum is σ = 1093335144. Its totient is φ = 911112600.

The previous prime is 1002223861. The next prime is 1002223889. The reversal of 1002223871 is 1783222001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1783222001 = 11 ⋅162111091.

It is a cyclic number.

It is not a de Polignac number, because 1002223871 - 2²⁶ = 935115007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1002223871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002223811) 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, 45555620 + ... + 45555641.

It is an arithmetic number, because the mean of its divisors is an integer number (273333786).

Almost surely, 2^1002223871 is an apocalyptic number.

1002223871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1002223871 is a deficient number, since it is larger than the sum of its proper divisors (91111273).

1002223871 is an equidigital number, since it uses as much as digits as its factorization.

1002223871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91111272.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1002223871 is about 31657.9195620938. The cubic root of 1002223871 is about 1000.7407414999.

Adding to 1002223871 its reverse (1783222001), we get a palindrome (2785445872).

The spelling of 1002223871 in words is "one billion, two million, two hundred twenty-three thousand, eight hundred seventy-one".