2151342461 has 2 divisors, whose sum is σ = 2151342462. Its totient is φ = 2151342460.

The previous prime is 2151342439. The next prime is 2151342493. The reversal of 2151342461 is 1642431512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2100847225 + 50495236 = 45835^2 + 7106^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2151342461 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2151342161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075671230 + 1075671231.

It is an arithmetic number, because the mean of its divisors is an integer number (1075671231).

Almost surely, 2^2151342461 is an apocalyptic number.

It is an amenable number.

2151342461 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151342461 is an equidigital number, since it uses as much as digits as its factorization.

2151342461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 29.

The square root of 2151342461 is about 46382.5663477130. The cubic root of 2151342461 is about 1290.9314549502.

Adding to 2151342461 its reverse (1642431512), we get a palindrome (3793773973).

The spelling of 2151342461 in words is "two billion, one hundred fifty-one million, three hundred forty-two thousand, four hundred sixty-one".