2151665002 has 4 divisors (see below), whose sum is σ = 3227497506. Its totient is φ = 1075832500.

The previous prime is 2151664969. The next prime is 2151665057. The reversal of 2151665002 is 2005661512.

2151665002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 1349019441 + 802645561 = 36729^2 + 28331^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 537916249 + ... + 537916252.

Almost surely, 2^2151665002 is an apocalyptic number.

2151665002 is a deficient number, since it is larger than the sum of its proper divisors (1075832504).

2151665002 is a wasteful number, since it uses less digits than its factorization.

2151665002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075832503.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 2151665002 is about 46386.0431811121. The cubic root of 2151665002 is about 1290.9959662221.

The spelling of 2151665002 in words is "two billion, one hundred fifty-one million, six hundred sixty-five thousand, two".