31332643201 has 4 divisors (see below), whose sum is σ = 31999295232. Its totient is φ = 30665991172.

The previous prime is 31332643183. The next prime is 31332643213. The reversal of 31332643201 is 10234623313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10234623313 = 34651 ⋅295363.

It is a cyclic number.

It is not a de Polignac number, because 31332643201 - 2²³ = 31324254593 is a prime.

It is a super-2 number, since 2×31332643201² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31332643201.

It is not an unprimeable number, because it can be changed into a prime (31332643241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333325945 + ... + 333326038.

It is an arithmetic number, because the mean of its divisors is an integer number (7999823808).

Almost surely, 2^31332643201 is an apocalyptic number.

It is an amenable number.

31332643201 is a deficient number, since it is larger than the sum of its proper divisors (666652031).

31332643201 is an equidigital number, since it uses as much as digits as its factorization.

31332643201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666652030.

The product of its (nonzero) digits is 7776, while the sum is 28.

The spelling of 31332643201 in words is "thirty-one billion, three hundred thirty-two million, six hundred forty-three thousand, two hundred one".