31542420115 has 4 divisors (see below), whose sum is σ = 37850904144. Its totient is φ = 25233936088.

The previous prime is 31542420103. The next prime is 31542420187. The reversal of 31542420115 is 51102424513.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31542420115 - 2⁹ = 31542419603 is a prime.

It is a super-2 number, since 2×31542420115² (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, 3154242007 + ... + 3154242016.

It is an arithmetic number, because the mean of its divisors is an integer number (9462726036).

Almost surely, 2^31542420115 is an apocalyptic number.

31542420115 is a deficient number, since it is larger than the sum of its proper divisors (6308484029).

31542420115 is an equidigital number, since it uses as much as digits as its factorization.

31542420115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6308484028.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 31542420115 its reverse (51102424513), we get a palindrome (82644844628).

The spelling of 31542420115 in words is "thirty-one billion, five hundred forty-two million, four hundred twenty thousand, one hundred fifteen".