2150055491 has 2 divisors, whose sum is σ = 2150055492. Its totient is φ = 2150055490.

The previous prime is 2150055469. The next prime is 2150055541. The reversal of 2150055491 is 1945500512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2150055491 is a prime.

It is a super-2 number, since 2×2150055491² = 9245477228758502162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2150055431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075027745 + 1075027746.

It is an arithmetic number, because the mean of its divisors is an integer number (1075027746).

Almost surely, 2^2150055491 is an apocalyptic number.

2150055491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2150055491 is an equidigital number, since it uses as much as digits as its factorization.

2150055491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 2150055491 is about 46368.6908484594. The cubic root of 2150055491 is about 1290.6739844814.

The spelling of 2150055491 in words is "two billion, one hundred fifty million, fifty-five thousand, four hundred ninety-one".