1211066552 has 8 divisors (see below), whose sum is σ = 2270749800. Its totient is φ = 605533272.

The previous prime is 1211066543. The next prime is 1211066557. The reversal of 1211066552 is 2556601121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211066557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75691652 + ... + 75691667.

It is an arithmetic number, because the mean of its divisors is an integer number (283843725).

Almost surely, 2^1211066552 is an apocalyptic number.

It is an amenable number.

1211066552 is a deficient number, since it is larger than the sum of its proper divisors (1059683248).

1211066552 is a wasteful number, since it uses less digits than its factorization.

1211066552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151383325 (or 151383321 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1211066552 is about 34800.3814921618. The cubic root of 1211066552 is about 1065.9152357838.

Adding to 1211066552 its reverse (2556601121), we get a palindrome (3767667673).

The spelling of 1211066552 in words is "one billion, two hundred eleven million, sixty-six thousand, five hundred fifty-two".