2155601465 has 8 divisors (see below), whose sum is σ = 2675919240. Its totient is φ = 1665016192.

The previous prime is 2155601453. The next prime is 2155601473. The reversal of 2155601465 is 5641065512.

It can be written as a sum of positive squares in 4 ways, for example, as 739132969 + 1416468496 = 27187^2 + 37636^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2155601465 - 2⁶ = 2155601401 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7432964 + ... + 7433253.

It is an arithmetic number, because the mean of its divisors is an integer number (334489905).

Almost surely, 2^2155601465 is an apocalyptic number.

It is an amenable number.

2155601465 is a deficient number, since it is larger than the sum of its proper divisors (520317775).

2155601465 is a wasteful number, since it uses less digits than its factorization.

2155601465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14866251.

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 2155601465 is about 46428.4553372175. The cubic root of 2155601465 is about 1291.7827773435.

Adding to 2155601465 its reverse (5641065512), we get a palindrome (7796666977).

The spelling of 2155601465 in words is "two billion, one hundred fifty-five million, six hundred one thousand, four hundred sixty-five".