31242330545 has 4 divisors (see below), whose sum is σ = 37490796660. Its totient is φ = 24993864432.

The previous prime is 31242330529. The next prime is 31242330589. The reversal of 31242330545 is 54503324213.

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 12756121249 + 18486209296 = 112943^2 + 135964^2 .

It is a cyclic number.

It is not a de Polignac number, because 31242330545 - 2⁴ = 31242330529 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3124233050 + ... + 3124233059.

It is an arithmetic number, because the mean of its divisors is an integer number (9372699165).

Almost surely, 2^31242330545 is an apocalyptic number.

It is an amenable number.

31242330545 is a deficient number, since it is larger than the sum of its proper divisors (6248466115).

31242330545 is an equidigital number, since it uses as much as digits as its factorization.

31242330545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6248466114.

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 31242330545 its reverse (54503324213), we get a palindrome (85745654758).

The spelling of 31242330545 in words is "thirty-one billion, two hundred forty-two million, three hundred thirty thousand, five hundred forty-five".