31542302105 has 4 divisors (see below), whose sum is σ = 37850762532. Its totient is φ = 25233841680.

The previous prime is 31542302083. The next prime is 31542302107. The reversal of 31542302105 is 50120324513.

It is a happy number.

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 18073306969 + 13468995136 = 134437^2 + 116056^2 .

It is not a de Polignac number, because 31542302105 - 2²² = 31538107801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31542302107) 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, 3154230206 + ... + 3154230215.

It is an arithmetic number, because the mean of its divisors is an integer number (9462690633).

Almost surely, 2^31542302105 is an apocalyptic number.

It is an amenable number.

31542302105 is a deficient number, since it is larger than the sum of its proper divisors (6308460427).

31542302105 is an equidigital number, since it uses as much as digits as its factorization.

31542302105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6308460426.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 31542302105 its reverse (50120324513), we get a palindrome (81662626618).

The spelling of 31542302105 in words is "thirty-one billion, five hundred forty-two million, three hundred two thousand, one hundred five".