2154565995 has 8 divisors (see below), whose sum is σ = 3447305616. Its totient is φ = 1149101856.

The previous prime is 2154565993. The next prime is 2154566021. The reversal of 2154565995 is 5995654512.

It is a happy number.

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

It is not a de Polignac number, because 2154565995 - 2¹ = 2154565993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2154565993) 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, 71818852 + ... + 71818881.

It is an arithmetic number, because the mean of its divisors is an integer number (430913202).

Almost surely, 2^2154565995 is an apocalyptic number.

2154565995 is a deficient number, since it is larger than the sum of its proper divisors (1292739621).

2154565995 is a wasteful number, since it uses less digits than its factorization.

2154565995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143637741.

The product of its digits is 2430000, while the sum is 51.

The square root of 2154565995 is about 46417.3027544686. The cubic root of 2154565995 is about 1291.5759029020.

The spelling of 2154565995 in words is "two billion, one hundred fifty-four million, five hundred sixty-five thousand, nine hundred ninety-five".