51520003 has 2 divisors, whose sum is σ = 51520004. Its totient is φ = 51520002.

The previous prime is 51519991. The next prime is 51520033. The reversal of 51520003 is 30002515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51520003 - 2⁹ = 51519491 is a prime.

It is not a weakly prime, because it can be changed into another prime (51520033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25760001 + 25760002.

It is an arithmetic number, because the mean of its divisors is an integer number (25760002).

Almost surely, 2^51520003 is an apocalyptic number.

51520003 is a deficient number, since it is larger than the sum of its proper divisors (1).

51520003 is an equidigital number, since it uses as much as digits as its factorization.

51520003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 51520003 is about 7177.7435869499. The cubic root of 51520003 is about 372.0991059604.

Adding to 51520003 its reverse (30002515), we get a palindrome (81522518).

The spelling of 51520003 in words is "fifty-one million, five hundred twenty thousand, three".