2154745117 has 8 divisors (see below), whose sum is σ = 2542003712. Its totient is φ = 1787346000.

The previous prime is 2154745081. The next prime is 2154745123. The reversal of 2154745117 is 7115474512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2154745117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152745117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4964634 + ... + 4965067.

It is an arithmetic number, because the mean of its divisors is an integer number (317750464).

Almost surely, 2^2154745117 is an apocalyptic number.

It is an amenable number.

2154745117 is a deficient number, since it is larger than the sum of its proper divisors (387258595).

2154745117 is an equidigital number, since it uses as much as digits as its factorization.

2154745117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9929739.

The product of its digits is 39200, while the sum is 37.

The square root of 2154745117 is about 46419.2321888245. The cubic root of 2154745117 is about 1291.6116940619.

The spelling of 2154745117 in words is "two billion, one hundred fifty-four million, seven hundred forty-five thousand, one hundred seventeen".