2154779241 has 8 divisors (see below), whose sum is σ = 2873768544. Its totient is φ = 1436154720.

The previous prime is 2154779239. The next prime is 2154779299. The reversal of 2154779241 is 1429774512.

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

It is not a de Polignac number, because 2154779241 - 2¹ = 2154779239 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 2154779193 and 2154779202.

It is not an unprimeable number, because it can be changed into a prime (2154779041) 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, 77100 + ... + 101261.

It is an arithmetic number, because the mean of its divisors is an integer number (359221068).

Almost surely, 2^2154779241 is an apocalyptic number.

It is an amenable number.

2154779241 is a deficient number, since it is larger than the sum of its proper divisors (718989303).

2154779241 is a wasteful number, since it uses less digits than its factorization.

2154779241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182391.

The product of its digits is 141120, while the sum is 42.

The square root of 2154779241 is about 46419.5997505364. The cubic root of 2154779241 is about 1291.6185123045.

The spelling of 2154779241 in words is "two billion, one hundred fifty-four million, seven hundred seventy-nine thousand, two hundred forty-one".