2155530404 has 24 divisors (see below), whose sum is σ = 3837988728. Its totient is φ = 1058999040.

The previous prime is 2155530397. The next prime is 2155530413. The reversal of 2155530404 is 4040355512.

It can be written as a sum of positive squares in 4 ways, for example, as 33085504 + 2122444900 = 5752^2 + 46070^2 .

It is a super-2 number, since 2×2155530404² = 9292622645136806432, which contains 22 as substring.

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, 263642 + ... + 271694.

It is an arithmetic number, because the mean of its divisors is an integer number (159916197).

Almost surely, 2^2155530404 is an apocalyptic number.

It is an amenable number.

2155530404 is a deficient number, since it is larger than the sum of its proper divisors (1682458324).

2155530404 is a wasteful number, since it uses less digits than its factorization.

2155530404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9215 (or 9213 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 2155530404 is about 46427.6900566892. The cubic root of 2155530404 is about 1291.7685823286.

Adding to 2155530404 its reverse (4040355512), we get a palindrome (6195885916).

The spelling of 2155530404 in words is "two billion, one hundred fifty-five million, five hundred thirty thousand, four hundred four".