2002815857 has 12 divisors (see below), whose sum is σ = 2337774516. Its totient is φ = 1710828000.

The previous prime is 2002815839. The next prime is 2002815911. The reversal of 2002815857 is 7585182002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1876275856 + 126540001 = 43316^2 + 11249^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2002815857 is a prime.

It is a super-2 number, since 2×2002815857² = 8022542714101288898, 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 2002815857.

It is not an unprimeable number, because it can be changed into a prime (2002815457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55394 + ... + 84107.

It is an arithmetic number, because the mean of its divisors is an integer number (194814543).

Almost surely, 2^2002815857 is an apocalyptic number.

It is an amenable number.

2002815857 is a deficient number, since it is larger than the sum of its proper divisors (334958659).

2002815857 is a wasteful number, since it uses less digits than its factorization.

2002815857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139808 (or 139801 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 2002815857 is about 44752.8307149391. The cubic root of 2002815857 is about 1260.5120655303.

Adding to 2002815857 its reverse (7585182002), we get a palindrome (9587997859).

The spelling of 2002815857 in words is "two billion, two million, eight hundred fifteen thousand, eight hundred fifty-seven".