31540052105 has 4 divisors (see below), whose sum is σ = 37848062532. Its totient is φ = 25232041680.

The previous prime is 31540051993. The next prime is 31540052123. The reversal of 31540052105 is 50125004513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50125004513 = 20123 ⋅2490931.

It can be written as a sum of positive squares in 2 ways, for example, as 4947574921 + 26592477184 = 70339^2 + 163072^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31540052105 is a prime.

It is a super-2 number, since 2×31540052105² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

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, 3154005206 + ... + 3154005215.

It is an arithmetic number, because the mean of its divisors is an integer number (9462015633).

Almost surely, 2^31540052105 is an apocalyptic number.

It is an amenable number.

31540052105 is a deficient number, since it is larger than the sum of its proper divisors (6308010427).

31540052105 is an equidigital number, since it uses as much as digits as its factorization.

31540052105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6308010426.

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 31540052105 its reverse (50125004513), we get a palindrome (81665056618).

The spelling of 31540052105 in words is "thirty-one billion, five hundred forty million, fifty-two thousand, one hundred five".