2152054991 has 2 divisors, whose sum is σ = 2152054992. Its totient is φ = 2152054990.

The previous prime is 2152054987. The next prime is 2152055011. The reversal of 2152054991 is 1994502512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2152054991 - 2² = 2152054987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2152054921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076027495 + 1076027496.

It is an arithmetic number, because the mean of its divisors is an integer number (1076027496).

Almost surely, 2^2152054991 is an apocalyptic number.

2152054991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2152054991 is an equidigital number, since it uses as much as digits as its factorization.

2152054991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 2152054991 is about 46390.2467227757. The cubic root of 2152054991 is about 1291.0739591268.

The spelling of 2152054991 in words is "two billion, one hundred fifty-two million, fifty-four thousand, nine hundred ninety-one".