2155013320 has 32 divisors (see below), whose sum is σ = 4861279800. Its totient is φ = 859783168.

The previous prime is 2155013293. The next prime is 2155013339. The reversal of 2155013320 is 233105512.

It can be written as a sum of positive squares in 4 ways, for example, as 780531844 + 1374481476 = 27938^2 + 37074^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2155013291 and 2155013300.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53689 + ... + 84808.

Almost surely, 2^2155013320 is an apocalyptic number.

2155013320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155013320 is an abundant number, since it is smaller than the sum of its proper divisors (2706266480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155013320 is a wasteful number, since it uses less digits than its factorization.

2155013320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138897 (or 138893 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 2155013320 is about 46422.1210200482. The cubic root of 2155013320 is about 1291.6652811825.

Adding to 2155013320 its reverse (233105512), we get a palindrome (2388118832).

The spelling of 2155013320 in words is "two billion, one hundred fifty-five million, thirteen thousand, three hundred twenty".