2091415801 has 2 divisors, whose sum is σ = 2091415802. Its totient is φ = 2091415800.

The previous prime is 2091415793. The next prime is 2091415853. The reversal of 2091415801 is 1085141902.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2031755625 + 59660176 = 45075^2 + 7724^2 .

It is a cyclic number.

It is not a de Polignac number, because 2091415801 - 2³ = 2091415793 is a prime.

It is not a weakly prime, because it can be changed into another prime (2091415201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045707900 + 1045707901.

It is an arithmetic number, because the mean of its divisors is an integer number (1045707901).

Almost surely, 2^2091415801 is an apocalyptic number.

It is an amenable number.

2091415801 is a deficient number, since it is larger than the sum of its proper divisors (1).

2091415801 is an equidigital number, since it uses as much as digits as its factorization.

2091415801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 2091415801 is about 45731.9997485349. Note that the first 3 decimals coincide. The cubic root of 2091415801 is about 1278.8319016707.

The spelling of 2091415801 in words is "two billion, ninety-one million, four hundred fifteen thousand, eight hundred one".