391201433201 has 16 divisors (see below), whose sum is σ = 415434839040. Its totient is φ = 367832612160.

The previous prime is 391201433191. The next prime is 391201433209. The reversal of 391201433201 is 102334102193.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-391201433201 is a prime.

It is a super-2 number, since 2×391201433201² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (391201433209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 986606 + ... + 1325063.

It is an arithmetic number, because the mean of its divisors is an integer number (25964677440).

Almost surely, 2^391201433201 is an apocalyptic number.

391201433201 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

391201433201 is a deficient number, since it is larger than the sum of its proper divisors (24233405839).

391201433201 is a wasteful number, since it uses less digits than its factorization.

391201433201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2311856.

The product of its (nonzero) digits is 3888, while the sum is 29.

Adding to 391201433201 its reverse (102334102193), we get a palindrome (493535535394).

The spelling of 391201433201 in words is "three hundred ninety-one billion, two hundred one million, four hundred thirty-three thousand, two hundred one".