2156556552 has 32 divisors (see below), whose sum is σ = 5419630080. Its totient is φ = 715087040.

The previous prime is 2156556529. The next prime is 2156556559. The reversal of 2156556552 is 2556556512.

It is a super-3 number, since 3×2156556552³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2156556559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230643 + ... + 239810.

It is an arithmetic number, because the mean of its divisors is an integer number (169363440).

Almost surely, 2^2156556552 is an apocalyptic number.

It is an amenable number.

2156556552 is an abundant number, since it is smaller than the sum of its proper divisors (3263073528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2156556552 is a wasteful number, since it uses less digits than its factorization.

2156556552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470653 (or 470649 counting only the distinct ones).

The product of its digits is 450000, while the sum is 42.

The square root of 2156556552 is about 46438.7397761826. The cubic root of 2156556552 is about 1291.9735335024.

The spelling of 2156556552 in words is "two billion, one hundred fifty-six million, five hundred fifty-six thousand, five hundred fifty-two".