65251603 has 4 divisors (see below), whose sum is σ = 65377368. Its totient is φ = 65125840.

The previous prime is 65251601. The next prime is 65251607. The reversal of 65251603 is 30615256.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65251603 - 2¹ = 65251601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65251601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62101 + ... + 63142.

It is an arithmetic number, because the mean of its divisors is an integer number (16344342).

Almost surely, 2^65251603 is an apocalyptic number.

65251603 is a deficient number, since it is larger than the sum of its proper divisors (125765).

65251603 is a wasteful number, since it uses less digits than its factorization.

65251603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125764.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 65251603 is about 8077.8464333014. The cubic root of 65251603 is about 402.5906908278.

Adding to 65251603 its reverse (30615256), we get a palindrome (95866859).

It can be divided in two parts, 6525 and 1603, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 65251603 in words is "sixty-five million, two hundred fifty-one thousand, six hundred three".