1651216097 has 2 divisors, whose sum is σ = 1651216098. Its totient is φ = 1651216096.

The previous prime is 1651216081. The next prime is 1651216117. The reversal of 1651216097 is 7906121561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1648684816 + 2531281 = 40604^2 + 1591^2 .

It is a cyclic number.

It is not a de Polignac number, because 1651216097 - 2⁴ = 1651216081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1651216097.

It is not a weakly prime, because it can be changed into another prime (1651216397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825608048 + 825608049.

It is an arithmetic number, because the mean of its divisors is an integer number (825608049).

Almost surely, 2^1651216097 is an apocalyptic number.

It is an amenable number.

1651216097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1651216097 is an equidigital number, since it uses as much as digits as its factorization.

1651216097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 1651216097 is about 40635.1583853195. The cubic root of 1651216097 is about 1181.9559862810.

The spelling of 1651216097 in words is "one billion, six hundred fifty-one million, two hundred sixteen thousand, ninety-seven".