7212562561 has 2 divisors, whose sum is σ = 7212562562. Its totient is φ = 7212562560.

The previous prime is 7212562543. The next prime is 7212562597. The reversal of 7212562561 is 1652652127.

7212562561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4906161936 + 2306400625 = 70044^2 + 48025^2 .

It is a cyclic number.

It is not a de Polignac number, because 7212562561 - 2¹¹ = 7212560513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7212562561.

It is not a weakly prime, because it can be changed into another prime (7212562541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3606281280 + 3606281281.

It is an arithmetic number, because the mean of its divisors is an integer number (3606281281).

Almost surely, 2^7212562561 is an apocalyptic number.

It is an amenable number.

7212562561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7212562561 is an equidigital number, since it uses as much as digits as its factorization.

7212562561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 37.

The square root of 7212562561 is about 84926.8070811567. The cubic root of 7212562561 is about 1932.1011740150.

The spelling of 7212562561 in words is "seven billion, two hundred twelve million, five hundred sixty-two thousand, five hundred sixty-one".