2153278815 has 8 divisors (see below), whose sum is σ = 3445246128. Its totient is φ = 1148415360.

The previous prime is 2153278811. The next prime is 2153278819. The reversal of 2153278815 is 5188723512.

It is an interprime number because it is at equal distance from previous prime (2153278811) and next prime (2153278819).

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

It is not a de Polignac number, because 2153278815 - 2² = 2153278811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153278811) 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, 71775946 + ... + 71775975.

It is an arithmetic number, because the mean of its divisors is an integer number (430655766).

Almost surely, 2^2153278815 is an apocalyptic number.

2153278815 is a deficient number, since it is larger than the sum of its proper divisors (1291967313).

2153278815 is a wasteful number, since it uses less digits than its factorization.

2153278815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143551929.

The product of its digits is 134400, while the sum is 42.

The square root of 2153278815 is about 46403.4353792906. The cubic root of 2153278815 is about 1291.3186474032.

The spelling of 2153278815 in words is "two billion, one hundred fifty-three million, two hundred seventy-eight thousand, eight hundred fifteen".