1331155412 has 12 divisors (see below), whose sum is σ = 2330493396. Its totient is φ = 665300160.

The previous prime is 1331155393. The next prime is 1331155439. The reversal of 1331155412 is 2145511331.

It can be written as a sum of positive squares in 2 ways, for example, as 66357316 + 1264798096 = 8146^2 + 35564^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58403 + ... + 77930.

It is an arithmetic number, because the mean of its divisors is an integer number (194207783).

Almost surely, 2^1331155412 is an apocalyptic number.

It is an amenable number.

1331155412 is a deficient number, since it is larger than the sum of its proper divisors (999337984).

1331155412 is a wasteful number, since it uses less digits than its factorization.

1331155412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138778 (or 138776 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The square root of 1331155412 is about 36485.0025626969. The cubic root of 1331155412 is about 1100.0428115569.

Adding to 1331155412 its reverse (2145511331), we get a palindrome (3476666743).

The spelling of 1331155412 in words is "one billion, three hundred thirty-one million, one hundred fifty-five thousand, four hundred twelve".