3131223533 has 2 divisors, whose sum is σ = 3131223534. Its totient is φ = 3131223532.

The previous prime is 3131223451. The next prime is 3131223547. The reversal of 3131223533 is 3353221313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2994497284 + 136726249 = 54722^2 + 11693^2 .

It is a cyclic number.

It is not a de Polignac number, because 3131223533 - 2¹⁰ = 3131222509 is a prime.

It is a super-2 number, since 2×3131223533² = 19609121627226004178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3131223593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565611766 + 1565611767.

It is an arithmetic number, because the mean of its divisors is an integer number (1565611767).

Almost surely, 2^3131223533 is an apocalyptic number.

It is an amenable number.

3131223533 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131223533 is an equidigital number, since it uses as much as digits as its factorization.

3131223533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 26.

The square root of 3131223533 is about 55957.3367218276. The cubic root of 3131223533 is about 1462.9787706422.

Adding to 3131223533 its reverse (3353221313), we get a palindrome (6484444846).

It can be divided in two parts, 31312 and 23533, that added together give a palindrome (54845).

The spelling of 3131223533 in words is "three billion, one hundred thirty-one million, two hundred twenty-three thousand, five hundred thirty-three".