51490363 has 2 divisors, whose sum is σ = 51490364. Its totient is φ = 51490362.

The previous prime is 51490357. The next prime is 51490381. The reversal of 51490363 is 36309415.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51490363 is a prime.

It is not a weakly prime, because it can be changed into another prime (51490343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25745181 + 25745182.

It is an arithmetic number, because the mean of its divisors is an integer number (25745182).

Almost surely, 2^51490363 is an apocalyptic number.

51490363 is a deficient number, since it is larger than the sum of its proper divisors (1).

51490363 is an equidigital number, since it uses as much as digits as its factorization.

51490363 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 51490363 is about 7175.6785741838. The cubic root of 51490363 is about 372.0277347611.

Adding to 51490363 its reverse (36309415), we get a palindrome (87799778).

The spelling of 51490363 in words is "fifty-one million, four hundred ninety thousand, three hundred sixty-three".