33491111131 has 2 divisors, whose sum is σ = 33491111132. Its totient is φ = 33491111130.

The previous prime is 33491111119. The next prime is 33491111153. The reversal of 33491111131 is 13111119433.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 33491111131 - 2²³ = 33482722523 is a prime.

It is a super-2 number, since 2×33491111131² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33491111131.

It is not a weakly prime, because it can be changed into another prime (33491111111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16745555565 + 16745555566.

It is an arithmetic number, because the mean of its divisors is an integer number (16745555566).

Almost surely, 2^33491111131 is an apocalyptic number.

33491111131 is a deficient number, since it is larger than the sum of its proper divisors (1).

33491111131 is an equidigital number, since it uses as much as digits as its factorization.

33491111131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 28.

The spelling of 33491111131 in words is "thirty-three billion, four hundred ninety-one million, one hundred eleven thousand, one hundred thirty-one".