2109136451 has 4 divisors (see below), whose sum is σ = 2109584400. Its totient is φ = 2108688504.

The previous prime is 2109136423. The next prime is 2109136481. The reversal of 2109136451 is 1546319012.

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 2109136451 - 2⁶ = 2109136387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2109136481) 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, 216836 + ... + 226353.

It is an arithmetic number, because the mean of its divisors is an integer number (527396100).

Almost surely, 2^2109136451 is an apocalyptic number.

2109136451 is a deficient number, since it is larger than the sum of its proper divisors (447949).

2109136451 is an equidigital number, since it uses as much as digits as its factorization.

2109136451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447948.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 2109136451 is about 45925.3356111852. The cubic root of 2109136451 is about 1282.4336129343.

The spelling of 2109136451 in words is "two billion, one hundred nine million, one hundred thirty-six thousand, four hundred fifty-one".