2154270691 has 2 divisors, whose sum is σ = 2154270692. Its totient is φ = 2154270690.

The previous prime is 2154270653. The next prime is 2154270707. The reversal of 2154270691 is 1960724512.

2154270691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2154270691 - 2¹¹ = 2154268643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2154270691.

It is not a weakly prime, because it can be changed into another prime (2154270641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077135345 + 1077135346.

It is an arithmetic number, because the mean of its divisors is an integer number (1077135346).

Almost surely, 2^2154270691 is an apocalyptic number.

2154270691 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154270691 is an equidigital number, since it uses as much as digits as its factorization.

2154270691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 2154270691 is about 46414.1216764898. The cubic root of 2154270691 is about 1291.5168925711.

The spelling of 2154270691 in words is "two billion, one hundred fifty-four million, two hundred seventy thousand, six hundred ninety-one".