2178472553 has 4 divisors (see below), whose sum is σ = 2180246340. Its totient is φ = 2176698768.

The previous prime is 2178472537. The next prime is 2178472567. The reversal of 2178472553 is 3552748712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1649334544 + 529138009 = 40612^2 + 23003^2 .

It is a cyclic number.

It is not a de Polignac number, because 2178472553 - 2⁴ = 2178472537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2178472523) 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, 885050 + ... + 887507.

It is an arithmetic number, because the mean of its divisors is an integer number (545061585).

Almost surely, 2^2178472553 is an apocalyptic number.

It is an amenable number.

2178472553 is a deficient number, since it is larger than the sum of its proper divisors (1773787).

2178472553 is a wasteful number, since it uses less digits than its factorization.

2178472553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773786.

The product of its digits is 470400, while the sum is 44.

The square root of 2178472553 is about 46674.1100932840. The cubic root of 2178472553 is about 1296.3353504051.

The spelling of 2178472553 in words is "two billion, one hundred seventy-eight million, four hundred seventy-two thousand, five hundred fifty-three".