5645003251 has 4 divisors (see below), whose sum is σ = 5645871504. Its totient is φ = 5644135000.

The previous prime is 5645003233. The next prime is 5645003263. The reversal of 5645003251 is 1523005465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1523005465 = 5 ⋅304601093.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5645003251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5645003851) 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, 424300 + ... + 437401.

It is an arithmetic number, because the mean of its divisors is an integer number (1411467876).

Almost surely, 2^5645003251 is an apocalyptic number.

5645003251 is a deficient number, since it is larger than the sum of its proper divisors (868253).

5645003251 is an equidigital number, since it uses as much as digits as its factorization.

5645003251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868252.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 5645003251 is about 75133.2366599496. The cubic root of 5645003251 is about 1780.5522894842.

The spelling of 5645003251 in words is "five billion, six hundred forty-five million, three thousand, two hundred fifty-one".