53251603 has 2 divisors, whose sum is σ = 53251604. Its totient is φ = 53251602.

The previous prime is 53251577. The next prime is 53251619. The reversal of 53251603 is 30615235.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53251603 is a prime.

It is equal to p_3184207 and since 53251603 and 3184207 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (53251643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26625801 + 26625802.

It is an arithmetic number, because the mean of its divisors is an integer number (26625802).

Almost surely, 2^53251603 is an apocalyptic number.

53251603 is a deficient number, since it is larger than the sum of its proper divisors (1).

53251603 is an equidigital number, since it uses as much as digits as its factorization.

53251603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 53251603 is about 7297.3695945868. The cubic root of 53251603 is about 376.2220352795. Note that the first 3 decimals are identical.

Adding to 53251603 its reverse (30615235), we get a palindrome (83866838).

The spelling of 53251603 in words is "fifty-three million, two hundred fifty-one thousand, six hundred three".