2151000002 has 4 divisors (see below), whose sum is σ = 3226500006. Its totient is φ = 1075500000.

The previous prime is 2151000001. The next prime is 2151000053. The reversal of 2151000002 is 2000001512.

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

It can be written as a sum of positive squares in only one way, i.e., 2096815681 + 54184321 = 45791^2 + 7361^2 .

It is not an unprimeable number, because it can be changed into a prime (2151000001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 537749999 + ... + 537750002.

Almost surely, 2^2151000002 is an apocalyptic number.

2151000002 is a deficient number, since it is larger than the sum of its proper divisors (1075500004).

2151000002 is a wasteful number, since it uses less digits than its factorization.

2151000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075500003.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 2151000002 is about 46378.8745227825. The cubic root of 2151000002 is about 1290.8629528306.

Adding to 2151000002 its reverse (2000001512), we get a palindrome (4151001514).

The spelling of 2151000002 in words is "two billion, one hundred fifty-one million, two", and thus it is an aban number.