2117903451 has 4 divisors (see below), whose sum is σ = 2823871272. Its totient is φ = 1411935632.

The previous prime is 2117903429. The next prime is 2117903453. The reversal of 2117903451 is 1543097112.

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 2117903451 - 2¹⁰ = 2117902427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2117903453) 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, 352983906 + ... + 352983911.

It is an arithmetic number, because the mean of its divisors is an integer number (705967818).

Almost surely, 2^2117903451 is an apocalyptic number.

2117903451 is a deficient number, since it is larger than the sum of its proper divisors (705967821).

2117903451 is an equidigital number, since it uses as much as digits as its factorization.

2117903451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705967820.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 2117903451 is about 46020.6850340149. The cubic root of 2117903451 is about 1284.2080442629.

The spelling of 2117903451 in words is "two billion, one hundred seventeen million, nine hundred three thousand, four hundred fifty-one".