1651430461 has 2 divisors, whose sum is σ = 1651430462. Its totient is φ = 1651430460.

The previous prime is 1651430441. The next prime is 1651430471. The reversal of 1651430461 is 1640341561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 886907961 + 764522500 = 29781^2 + 27650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1651430461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1651430411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825715230 + 825715231.

It is an arithmetic number, because the mean of its divisors is an integer number (825715231).

Almost surely, 2^1651430461 is an apocalyptic number.

It is an amenable number.

1651430461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1651430461 is an equidigital number, since it uses as much as digits as its factorization.

1651430461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1651430461 is about 40637.7959663169. The cubic root of 1651430461 is about 1182.0071319892.

Subtracting from 1651430461 its reverse (1640341561), we obtain a square (11088900 = 3330²).

The spelling of 1651430461 in words is "one billion, six hundred fifty-one million, four hundred thirty thousand, four hundred sixty-one".