1331388621541 has 8 divisors (see below), whose sum is σ = 1452964118400. Its totient is φ = 1209903152640.

The previous prime is 1331388621467. The next prime is 1331388621547. The reversal of 1331388621541 is 1451268831331.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331388621541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331388621491 and 1331388621500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331388621547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22476061 + ... + 22535218.

It is an arithmetic number, because the mean of its divisors is an integer number (181620514800).

Almost surely, 2^{1331388621541} is an apocalyptic number.

1331388621541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1331388621541 is a deficient number, since it is larger than the sum of its proper divisors (121575496859).

1331388621541 is a wasteful number, since it uses less digits than its factorization.

1331388621541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45013979.

The product of its digits is 414720, while the sum is 46.

The spelling of 1331388621541 in words is "one trillion, three hundred thirty-one billion, three hundred eighty-eight million, six hundred twenty-one thousand, five hundred forty-one".