1651515149 has 2 divisors, whose sum is σ = 1651515150. Its totient is φ = 1651515148.

The previous prime is 1651515121. The next prime is 1651515163. The reversal of 1651515149 is 9415151561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1273990249 + 377524900 = 35693^2 + 19430^2 .

It is an emirp because it is prime and its reverse (9415151561) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1651515149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1651515109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825757574 + 825757575.

It is an arithmetic number, because the mean of its divisors is an integer number (825757575).

Almost surely, 2^1651515149 is an apocalyptic number.

It is an amenable number.

1651515149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1651515149 is an equidigital number, since it uses as much as digits as its factorization.

1651515149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27000, while the sum is 38.

The square root of 1651515149 is about 40638.8379386025. The cubic root of 1651515149 is about 1182.0273367170.

The spelling of 1651515149 in words is "one billion, six hundred fifty-one million, five hundred fifteen thousand, one hundred forty-nine".