2012165651 has 4 divisors (see below), whose sum is σ = 2061242904. Its totient is φ = 1963088400.

The previous prime is 2012165647. The next prime is 2012165657. The reversal of 2012165651 is 1565612102.

It is a happy number.

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 2012165651 - 2² = 2012165647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2012165657) 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, 24538565 + ... + 24538646.

It is an arithmetic number, because the mean of its divisors is an integer number (515310726).

Almost surely, 2^2012165651 is an apocalyptic number.

2012165651 is a deficient number, since it is larger than the sum of its proper divisors (49077253).

2012165651 is an equidigital number, since it uses as much as digits as its factorization.

2012165651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49077252.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 2012165651 is about 44857.1694492642. The cubic root of 2012165651 is about 1262.4705141759.

Adding to 2012165651 its reverse (1565612102), we get a palindrome (3577777753).

The spelling of 2012165651 in words is "two billion, twelve million, one hundred sixty-five thousand, six hundred fifty-one".