2191433 has 2 divisors, whose sum is σ = 2191434. Its totient is φ = 2191432.

The previous prime is 2191429. The next prime is 2191451. The reversal of 2191433 is 3341912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2166784 + 24649 = 1472^2 + 157^2 .

It is a cyclic number.

It is not a de Polignac number, because 2191433 - 2² = 2191429 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2⁷ + 1 + 9⁶ + 1 + 4⁸ + 3 + 3¹³ .

It is a junction number, because it is equal to n+sod(n) for n = 2191399 and 2191408.

It is not a weakly prime, because it can be changed into another prime (2191493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1095716 + 1095717.

It is an arithmetic number, because the mean of its divisors is an integer number (1095717).

2^2191433 is an apocalyptic number.

It is an amenable number.

2191433 is a deficient number, since it is larger than the sum of its proper divisors (1).

2191433 is an equidigital number, since it uses as much as digits as its factorization.

2191433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

The square root of 2191433 is about 1480.3489453504. The cubic root of 2191433 is about 129.8901043644.

The spelling of 2191433 in words is "two million, one hundred ninety-one thousand, four hundred thirty-three".