2002157447 has 4 divisors (see below), whose sum is σ = 2002677216. Its totient is φ = 2001637680.

The previous prime is 2002157407. The next prime is 2002157459. The reversal of 2002157447 is 7447512002.

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 2002157447 - 2⁸ = 2002157191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002157407) 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, 254063 + ... + 261824.

It is an arithmetic number, because the mean of its divisors is an integer number (500669304).

Almost surely, 2^2002157447 is an apocalyptic number.

2002157447 is a deficient number, since it is larger than the sum of its proper divisors (519769).

2002157447 is an equidigital number, since it uses as much as digits as its factorization.

2002157447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519768.

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 2002157447 is about 44745.4740392813. The cubic root of 2002157447 is about 1260.3739225740.

Adding to 2002157447 its reverse (7447512002), we get a palindrome (9449669449).

The spelling of 2002157447 in words is "two billion, two million, one hundred fifty-seven thousand, four hundred forty-seven".