2251664403 has 4 divisors (see below), whose sum is σ = 3002219208. Its totient is φ = 1501109600.

The previous prime is 2251664383. The next prime is 2251664413. The reversal of 2251664403 is 3044661522.

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 2251664403 - 2¹⁷ = 2251533331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2251664413) 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, 375277398 + ... + 375277403.

It is an arithmetic number, because the mean of its divisors is an integer number (750554802).

Almost surely, 2^2251664403 is an apocalyptic number.

2251664403 is a deficient number, since it is larger than the sum of its proper divisors (750554805).

2251664403 is an equidigital number, since it uses as much as digits as its factorization.

2251664403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750554804.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 2251664403 is about 47451.7060072660. The cubic root of 2251664403 is about 1310.6937263425.

The spelling of 2251664403 in words is "two billion, two hundred fifty-one million, six hundred sixty-four thousand, four hundred three".