31445000031331 has 16 divisors (see below), whose sum is σ = 33184972807200. Its totient is φ = 29713535424000.

The previous prime is 31445000031329. The next prime is 31445000031409. The reversal of 31445000031331 is 13313000054413.

It is a cyclic number.

It is not a de Polignac number, because 31445000031331 - 2¹ = 31445000031329 is a prime.

It is a super-2 number, since 2×31445000031331² (a number of 28 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 31445000031331.

It is not an unprimeable number, because it can be changed into a prime (31445000031301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109120185 + ... + 109407973.

It is an arithmetic number, because the mean of its divisors is an integer number (2074060800450).

Almost surely, 2^{31445000031331} is an apocalyptic number.

31445000031331 is a deficient number, since it is larger than the sum of its proper divisors (1739972775869).

31445000031331 is a wasteful number, since it uses less digits than its factorization.

31445000031331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302550.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 31445000031331 its reverse (13313000054413), we get a palindrome (44758000085744).

The spelling of 31445000031331 in words is "thirty-one trillion, four hundred forty-five billion, thirty-one thousand, three hundred thirty-one".