2154215263 has 8 divisors (see below), whose sum is σ = 2210889168. Its totient is φ = 2098135104.

The previous prime is 2154215243. The next prime is 2154215279. The reversal of 2154215263 is 3625124512.

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-2154215263 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 (2154215243) by changing a digit.

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, 141081 + ... + 155602.

It is an arithmetic number, because the mean of its divisors is an integer number (276361146).

Almost surely, 2^2154215263 is an apocalyptic number.

2154215263 is a deficient number, since it is larger than the sum of its proper divisors (56673905).

2154215263 is a wasteful number, since it uses less digits than its factorization.

2154215263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296873.

The product of its digits is 14400, while the sum is 31.

The square root of 2154215263 is about 46413.5245698923. The cubic root of 2154215263 is about 1291.5058158429.

Adding to 2154215263 its reverse (3625124512), we get a palindrome (5779339775).

The spelling of 2154215263 in words is "two billion, one hundred fifty-four million, two hundred fifteen thousand, two hundred sixty-three".