1531323221201 has 8 divisors (see below), whose sum is σ = 1601927444544. Its totient is φ = 1461054410640.

The previous prime is 1531323221191. The next prime is 1531323221227. The reversal of 1531323221201 is 1021223231351.

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-1531323221201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1531323221101) 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, 83843855 + ... + 83862116.

It is an arithmetic number, because the mean of its divisors is an integer number (200240930568).

Almost surely, 2^{1531323221201} is an apocalyptic number.

It is an amenable number.

1531323221201 is a deficient number, since it is larger than the sum of its proper divisors (70604223343).

1531323221201 is a wasteful number, since it uses less digits than its factorization.

1531323221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167706391.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 1531323221201 its reverse (1021223231351), we get a palindrome (2552546452552).

The spelling of 1531323221201 in words is "one trillion, five hundred thirty-one billion, three hundred twenty-three million, two hundred twenty-one thousand, two hundred one".