2091305651 has 2 divisors, whose sum is σ = 2091305652. Its totient is φ = 2091305650.

The previous prime is 2091305633. The next prime is 2091305669. The reversal of 2091305651 is 1565031902.

It is a balanced prime because it is at equal distance from previous prime (2091305633) and next prime (2091305669).

It is a cyclic number.

It is not a de Polignac number, because 2091305651 - 2²² = 2087111347 is a prime.

It is not a weakly prime, because it can be changed into another prime (2091305551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045652825 + 1045652826.

It is an arithmetic number, because the mean of its divisors is an integer number (1045652826).

Almost surely, 2^2091305651 is an apocalyptic number.

2091305651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2091305651 is an equidigital number, since it uses as much as digits as its factorization.

2091305651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 2091305651 is about 45730.7954337118. The cubic root of 2091305651 is about 1278.8094502437.

The spelling of 2091305651 in words is "two billion, ninety-one million, three hundred five thousand, six hundred fifty-one".