2154033491 has 2 divisors, whose sum is σ = 2154033492. Its totient is φ = 2154033490.

The previous prime is 2154033487. The next prime is 2154033509. The reversal of 2154033491 is 1943304512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2154033491 - 2² = 2154033487 is a prime.

It is not a weakly prime, because it can be changed into another prime (2154036491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077016745 + 1077016746.

It is an arithmetic number, because the mean of its divisors is an integer number (1077016746).

Almost surely, 2^2154033491 is an apocalyptic number.

2154033491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154033491 is an equidigital number, since it uses as much as digits as its factorization.

2154033491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 2154033491 is about 46411.5663493487. The cubic root of 2154033491 is about 1291.4694892043.

The spelling of 2154033491 in words is "two billion, one hundred fifty-four million, thirty-three thousand, four hundred ninety-one".