31530553345 has 4 divisors (see below), whose sum is σ = 37836664020. Its totient is φ = 25224442672.

The previous prime is 31530553343. The next prime is 31530553349. The reversal of 31530553345 is 54335503513.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7142109121 + 24388444224 = 84511^2 + 156168^2 .

It is a cyclic number.

It is not a de Polignac number, because 31530553345 - 2¹ = 31530553343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31530553343) 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, 3153055330 + ... + 3153055339.

It is an arithmetic number, because the mean of its divisors is an integer number (9459166005).

Almost surely, 2^31530553345 is an apocalyptic number.

It is an amenable number.

31530553345 is a deficient number, since it is larger than the sum of its proper divisors (6306110675).

31530553345 is an equidigital number, since it uses as much as digits as its factorization.

31530553345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6306110674.

The product of its (nonzero) digits is 202500, while the sum is 37.

The spelling of 31530553345 in words is "thirty-one billion, five hundred thirty million, five hundred fifty-three thousand, three hundred forty-five".