31001345545 has 8 divisors (see below), whose sum is σ = 37213553160. Its totient is φ = 24793117440.

The previous prime is 31001345527. The next prime is 31001345671. The reversal of 31001345545 is 54554310013.

It can be written as a sum of positive squares in 4 ways, for example, as 1629898384 + 29371447161 = 40372^2 + 171381^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31001345545 - 2²¹ = 30999248393 is a prime.

It is a super-2 number, since 2×31001345545² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 977710 + ... + 1008919.

It is an arithmetic number, because the mean of its divisors is an integer number (4651694145).

Almost surely, 2^31001345545 is an apocalyptic number.

It is an amenable number.

31001345545 is a deficient number, since it is larger than the sum of its proper divisors (6212207615).

31001345545 is a wasteful number, since it uses less digits than its factorization.

31001345545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1989755.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 31001345545 its reverse (54554310013), we get a palindrome (85555655558).

The spelling of 31001345545 in words is "thirty-one billion, one million, three hundred forty-five thousand, five hundred forty-five".