1331540554 has 8 divisors (see below), whose sum is σ = 1997482500. Its totient is φ = 665713056.

The previous prime is 1331540549. The next prime is 1331540557. The reversal of 1331540554 is 4550451331.

It can be written as a sum of positive squares in 2 ways, for example, as 1151041329 + 180499225 = 33927^2 + 13435^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1331540557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12012 + ... + 52984.

Almost surely, 2^1331540554 is an apocalyptic number.

1331540554 is a deficient number, since it is larger than the sum of its proper divisors (665941946).

1331540554 is a wasteful number, since it uses less digits than its factorization.

1331540554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57224.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 1331540554 is about 36490.2802674904. The cubic root of 1331540554 is about 1100.1488927931.

Adding to 1331540554 its reverse (4550451331), we get a palindrome (5881991885).

The spelling of 1331540554 in words is "one billion, three hundred thirty-one million, five hundred forty thousand, five hundred fifty-four".