2131520115 has 16 divisors (see below), whose sum is σ = 3425074848. Its totient is φ = 1131929856.

The previous prime is 2131520107. The next prime is 2131520119. The reversal of 2131520115 is 5110251312.

It is not a de Polignac number, because 2131520115 - 2³ = 2131520107 is a prime.

It is a super-2 number, since 2×2131520115² = 9086756001299226450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2131520091 and 2131520100.

It is not an unprimeable number, because it can be changed into a prime (2131520119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301444 + ... + 308433.

It is an arithmetic number, because the mean of its divisors is an integer number (214067178).

Almost surely, 2^2131520115 is an apocalyptic number.

2131520115 is a deficient number, since it is larger than the sum of its proper divisors (1293554733).

2131520115 is a wasteful number, since it uses less digits than its factorization.

2131520115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610118.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 2131520115 is about 46168.3886983291. The cubic root of 2131520115 is about 1286.9543587927.

Adding to 2131520115 its reverse (5110251312), we get a palindrome (7241771427).

The spelling of 2131520115 in words is "two billion, one hundred thirty-one million, five hundred twenty thousand, one hundred fifteen".