51028403 has 2 divisors, whose sum is σ = 51028404. Its totient is φ = 51028402.

The previous prime is 51028361. The next prime is 51028409. The reversal of 51028403 is 30482015.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51028403 - 2²⁰ = 49979827 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (51028409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25514201 + 25514202.

It is an arithmetic number, because the mean of its divisors is an integer number (25514202).

Almost surely, 2^51028403 is an apocalyptic number.

51028403 is a deficient number, since it is larger than the sum of its proper divisors (1).

51028403 is an equidigital number, since it uses as much as digits as its factorization.

51028403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 51028403 is about 7143.4167595066. The cubic root of 51028403 is about 370.9118076346.

The spelling of 51028403 in words is "fifty-one million, twenty-eight thousand, four hundred three".