2154355065 has 24 divisors (see below), whose sum is σ = 3745322568. Its totient is φ = 1145571840.

The previous prime is 2154355061. The next prime is 2154355069. The reversal of 2154355065 is 5605534512.

2154355065 is a `hidden beast` number, since 2 + 1 + 5 + 43 + 550 + 65 = 666.

It is an interprime number because it is at equal distance from previous prime (2154355061) and next prime (2154355069).

It can be written as a sum of positive squares in 4 ways, for example, as 243266409 + 1911088656 = 15597^2 + 43716^2 .

It is not a de Polignac number, because 2154355065 - 2² = 2154355061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2154355061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55866 + ... + 86195.

It is an arithmetic number, because the mean of its divisors is an integer number (156055107).

Almost surely, 2^2154355065 is an apocalyptic number.

It is an amenable number.

2154355065 is a deficient number, since it is larger than the sum of its proper divisors (1590967503).

2154355065 is a wasteful number, since it uses less digits than its factorization.

2154355065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142409 (or 142406 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The square root of 2154355065 is about 46415.0305935480. The cubic root of 2154355065 is about 1291.5337535013.

Adding to 2154355065 its reverse (5605534512), we get a palindrome (7759889577).

The spelling of 2154355065 in words is "two billion, one hundred fifty-four million, three hundred fifty-five thousand, sixty-five".