31453522645 has 4 divisors (see below), whose sum is σ = 37744227180. Its totient is φ = 25162818112.

The previous prime is 31453522643. The next prime is 31453522669. The reversal of 31453522645 is 54622535413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54622535413 = 251 ⋅217619663.

It can be written as a sum of positive squares in 2 ways, for example, as 3304065361 + 28149457284 = 57481^2 + 167778^2 .

It is a cyclic number.

It is not a de Polignac number, because 31453522645 - 2¹ = 31453522643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31453522598 and 31453522607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31453522643) 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 3 ways as a sum of consecutive naturals, for example, 3145352260 + ... + 3145352269.

It is an arithmetic number, because the mean of its divisors is an integer number (9436056795).

Almost surely, 2^31453522645 is an apocalyptic number.

It is an amenable number.

31453522645 is a deficient number, since it is larger than the sum of its proper divisors (6290704535).

31453522645 is an equidigital number, since it uses as much as digits as its factorization.

31453522645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6290704534.

The product of its digits is 432000, while the sum is 40.

The spelling of 31453522645 in words is "thirty-one billion, four hundred fifty-three million, five hundred twenty-two thousand, six hundred forty-five".