1331155404 has 48 divisors (see below), whose sum is σ = 3509654400. Its totient is φ = 436195728.

The previous prime is 1331155393. The next prime is 1331155439. The reversal of 1331155404 is 4045511331.

It is a happy number.

1331155404 is a `hidden beast` number, since 1 + 3 + 3 + 115 + 540 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98082 + ... + 110825.

It is an arithmetic number, because the mean of its divisors is an integer number (73117800).

Almost surely, 2^1331155404 is an apocalyptic number.

It is an amenable number.

1331155404 is an abundant number, since it is smaller than the sum of its proper divisors (2178498996).

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

1331155404 is a wasteful number, since it uses less digits than its factorization.

1331155404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208979 (or 208971 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1331155404 is about 36485.0024530628. The cubic root of 1331155404 is about 1100.0428093532.

Adding to 1331155404 its reverse (4045511331), we get a palindrome (5376666735).

The spelling of 1331155404 in words is "one billion, three hundred thirty-one million, one hundred fifty-five thousand, four hundred four".