31304135545 has 4 divisors (see below), whose sum is σ = 37564962660. Its totient is φ = 25043308432.

The previous prime is 31304135543. The next prime is 31304135561. The reversal of 31304135545 is 54553140313.

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 3556571769 + 27747563776 = 59637^2 + 166576^2 .

It is a cyclic number.

It is not a de Polignac number, because 31304135545 - 2¹ = 31304135543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31304135545.

It is not an unprimeable number, because it can be changed into a prime (31304135543) 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, 3130413550 + ... + 3130413559.

It is an arithmetic number, because the mean of its divisors is an integer number (9391240665).

Almost surely, 2^31304135545 is an apocalyptic number.

It is an amenable number.

31304135545 is a deficient number, since it is larger than the sum of its proper divisors (6260827115).

31304135545 is an equidigital number, since it uses as much as digits as its factorization.

31304135545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6260827114.

The product of its (nonzero) digits is 54000, while the sum is 34.

Adding to 31304135545 its reverse (54553140313), we get a palindrome (85857275858).

The spelling of 31304135545 in words is "thirty-one billion, three hundred four million, one hundred thirty-five thousand, five hundred forty-five".