51398603 has 2 divisors, whose sum is σ = 51398604. Its totient is φ = 51398602.

The previous prime is 51398579. The next prime is 51398609. The reversal of 51398603 is 30689315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51398603 - 2¹⁶ = 51333067 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (51398609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25699301 + 25699302.

It is an arithmetic number, because the mean of its divisors is an integer number (25699302).

Almost surely, 2^51398603 is an apocalyptic number.

51398603 is a deficient number, since it is larger than the sum of its proper divisors (1).

51398603 is an equidigital number, since it uses as much as digits as its factorization.

51398603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 51398603 is about 7169.2819026734. The cubic root of 51398603 is about 371.8066088292.

The spelling of 51398603 in words is "fifty-one million, three hundred ninety-eight thousand, six hundred three".