1213955233 has 2 divisors, whose sum is σ = 1213955234. Its totient is φ = 1213955232.

The previous prime is 1213955221. The next prime is 1213955251. The reversal of 1213955233 is 3325593121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1191078144 + 22877089 = 34512^2 + 4783^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213955233 - 2¹³ = 1213947041 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213955263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606977616 + 606977617.

It is an arithmetic number, because the mean of its divisors is an integer number (606977617).

Almost surely, 2^1213955233 is an apocalyptic number.

It is an amenable number.

1213955233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213955233 is an equidigital number, since it uses as much as digits as its factorization.

1213955233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24300, while the sum is 34.

The square root of 1213955233 is about 34841.8603550384. The cubic root of 1213955233 is about 1066.7620497495.

The spelling of 1213955233 in words is "one billion, two hundred thirteen million, nine hundred fifty-five thousand, two hundred thirty-three".