51142361 has 2 divisors, whose sum is σ = 51142362. Its totient is φ = 51142360.

The previous prime is 51142303. The next prime is 51142367. The reversal of 51142361 is 16324115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51036736 + 105625 = 7144^2 + 325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51142361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51142367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25571180 + 25571181.

It is an arithmetic number, because the mean of its divisors is an integer number (25571181).

Almost surely, 2^51142361 is an apocalyptic number.

It is an amenable number.

51142361 is a deficient number, since it is larger than the sum of its proper divisors (1).

51142361 is an equidigital number, since it uses as much as digits as its factorization.

51142361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 23.

The square root of 51142361 is about 7151.3887462506. The cubic root of 51142361 is about 371.1877124204.

Adding to 51142361 its reverse (16324115), we get a palindrome (67466476).

The spelling of 51142361 in words is "fifty-one million, one hundred forty-two thousand, three hundred sixty-one".