1331544401 has 8 divisors (see below), whose sum is σ = 1452923904. Its totient is φ = 1210219920.

The previous prime is 1331544371. The next prime is 1331544433. The reversal of 1331544401 is 1044451331.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1331544401 - 2⁶ = 1331544337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331541401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49535 + ... + 71531.

It is an arithmetic number, because the mean of its divisors is an integer number (181615488).

Almost surely, 2^1331544401 is an apocalyptic number.

1331544401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1331544401 is a deficient number, since it is larger than the sum of its proper divisors (121379503).

1331544401 is a wasteful number, since it uses less digits than its factorization.

1331544401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27511.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1331544401 is about 36490.3329801195. The cubic root of 1331544401 is about 1100.1499522848.

Adding to 1331544401 its reverse (1044451331), we get a palindrome (2375995732).

The spelling of 1331544401 in words is "one billion, three hundred thirty-one million, five hundred forty-four thousand, four hundred one".