7212155560 has 16 divisors (see below), whose sum is σ = 16227350100. Its totient is φ = 2884862208.

The previous prime is 7212155557. The next prime is 7212155567. The reversal of 7212155560 is 655512127.

It can be written as a sum of positive squares in 2 ways, for example, as 7083242244 + 128913316 = 84162^2 + 11354^2 .

It is not an unprimeable number, because it can be changed into a prime (7212155567) 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, 90151905 + ... + 90151984.

Almost surely, 2^7212155560 is an apocalyptic number.

It is an amenable number.

7212155560 is an abundant number, since it is smaller than the sum of its proper divisors (9015194540).

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

7212155560 is a wasteful number, since it uses less digits than its factorization.

7212155560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180303900 (or 180303896 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 7212155560 is about 84924.4108604823. The cubic root of 7212155560 is about 1932.0648308571.

Adding to 7212155560 its reverse (655512127), we get a palindrome (7867667687).

The spelling of 7212155560 in words is "seven billion, two hundred twelve million, one hundred fifty-five thousand, five hundred sixty".