212561569936 has 45 divisors (see below), whose sum is σ = 417403259091. Its totient is φ = 104863535712.

The previous prime is 212561569933. The next prime is 212561569943. The reversal of 212561569936 is 639965165212.

The square root of 212561569936 is 461044.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212561569933) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 145689175 + ... + 145690633.

Almost surely, 2^212561569936 is an apocalyptic number.

212561569936 is the 461044-th square number.

It is an amenable number.

212561569936 is a deficient number, since it is larger than the sum of its proper divisors (204841689155).

212561569936 is an frugal number, since it uses more digits than its factorization.

212561569936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3084 (or 1540 counting only the distinct ones).

The product of its digits is 5248800, while the sum is 55.

The spelling of 212561569936 in words is "two hundred twelve billion, five hundred sixty-one million, five hundred sixty-nine thousand, nine hundred thirty-six".