2131515105 has 8 divisors (see below), whose sum is σ = 3410424192. Its totient is φ = 1136808048.

The previous prime is 2131515091. The next prime is 2131515119. The reversal of 2131515105 is 5015151312.

It is an interprime number because it is at equal distance from previous prime (2131515091) and next prime (2131515119).

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

It is not a de Polignac number, because 2131515105 - 2¹⁵ = 2131482337 is a prime.

It is a super-2 number, since 2×2131515105² = 9086713285686322050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71050489 + ... + 71050518.

It is an arithmetic number, because the mean of its divisors is an integer number (426303024).

Almost surely, 2^2131515105 is an apocalyptic number.

It is an amenable number.

2131515105 is a deficient number, since it is larger than the sum of its proper divisors (1278909087).

2131515105 is a wasteful number, since it uses less digits than its factorization.

2131515105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142101015.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 2131515105 is about 46168.3344403932. The cubic root of 2131515105 is about 1286.9533504909.

Adding to 2131515105 its reverse (5015151312), we get a palindrome (7146666417).

The spelling of 2131515105 in words is "two billion, one hundred thirty-one million, five hundred fifteen thousand, one hundred five".