2051223645 has 32 divisors (see below), whose sum is σ = 3395395584. Its totient is φ = 1056704000.

The previous prime is 2051223631. The next prime is 2051223659. The reversal of 2051223645 is 5463221502.

It is an interprime number because it is at equal distance from previous prime (2051223631) and next prime (2051223659).

It is not a de Polignac number, because 2051223645 - 2¹¹ = 2051221597 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45604 + ... + 78626.

It is an arithmetic number, because the mean of its divisors is an integer number (106106112).

Almost surely, 2^2051223645 is an apocalyptic number.

It is an amenable number.

2051223645 is a deficient number, since it is larger than the sum of its proper divisors (1344171939).

2051223645 is a wasteful number, since it uses less digits than its factorization.

2051223645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33173.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 2051223645 is about 45290.4365732988. The cubic root of 2051223645 is about 1270.5867966395.

The spelling of 2051223645 in words is "two billion, fifty-one million, two hundred twenty-three thousand, six hundred forty-five".