2188651172 has 12 divisors (see below), whose sum is σ = 3858097740. Its totient is φ = 1086337536.

The previous prime is 2188651163. The next prime is 2188651193. The reversal of 2188651172 is 2711568812.

It can be written as a sum of positive squares in 2 ways, for example, as 925133056 + 1263518116 = 30416^2 + 35546^2 .

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, 1996397 + ... + 1997492.

It is an arithmetic number, because the mean of its divisors is an integer number (321508145).

Almost surely, 2^2188651172 is an apocalyptic number.

It is an amenable number.

2188651172 is a deficient number, since it is larger than the sum of its proper divisors (1669446568).

2188651172 is a wasteful number, since it uses less digits than its factorization.

2188651172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3994030 (or 3994028 counting only the distinct ones).

The product of its digits is 53760, while the sum is 41.

The square root of 2188651172 is about 46783.0222623550. The cubic root of 2188651172 is about 1298.3511980564.

The spelling of 2188651172 in words is "two billion, one hundred eighty-eight million, six hundred fifty-one thousand, one hundred seventy-two".