1212755533 has 6 divisors (see below), whose sum is σ = 1333028942. Its totient is φ = 1102504920.

The previous prime is 1212755521. The next prime is 1212755587. The reversal of 1212755533 is 3355572121.

It can be written as a sum of positive squares in only one way, i.e., 880130889 + 332624644 = 29667^2 + 18238^2 .

It is not a de Polignac number, because 1212755533 - 2⁹ = 1212755021 is a prime.

It is a super-2 number, since 2×1212755533² = 2941551965644228178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212755633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5011266 + ... + 5011507.

Almost surely, 2^1212755533 is an apocalyptic number.

It is an amenable number.

1212755533 is a deficient number, since it is larger than the sum of its proper divisors (120273409).

1212755533 is a wasteful number, since it uses less digits than its factorization.

1212755533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10022795 (or 10022784 counting only the distinct ones).

The product of its digits is 31500, while the sum is 34.

The square root of 1212755533 is about 34824.6397397015. The cubic root of 1212755533 is about 1066.4105221652.

The spelling of 1212755533 in words is "one billion, two hundred twelve million, seven hundred fifty-five thousand, five hundred thirty-three".