2101723556 has 12 divisors (see below), whose sum is σ = 3763551792. Its totient is φ = 1026423048.

The previous prime is 2101723529. The next prime is 2101723567. The reversal of 2101723556 is 6553271012.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6109490 + ... + 6109833.

It is an arithmetic number, because the mean of its divisors is an integer number (313629316).

Almost surely, 2^2101723556 is an apocalyptic number.

It is an amenable number.

2101723556 is a deficient number, since it is larger than the sum of its proper divisors (1661828236).

2101723556 is a wasteful number, since it uses less digits than its factorization.

2101723556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12219370 (or 12219368 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 2101723556 is about 45844.5586302235. The cubic root of 2101723556 is about 1280.9294104392.

Adding to 2101723556 its reverse (6553271012), we get a palindrome (8654994568).

The spelling of 2101723556 in words is "two billion, one hundred one million, seven hundred twenty-three thousand, five hundred fifty-six".