102115131 has 4 divisors (see below), whose sum is σ = 136153512. Its totient is φ = 68076752.

The previous prime is 102115121. The next prime is 102115151. The reversal of 102115131 is 131511201.

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 102115131 - 2⁹ = 102114619 is a prime.

It is a super-2 number, since 2×102115131² = 20854999958294322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102115131.

It is not an unprimeable number, because it can be changed into a prime (102115121) 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, 17019186 + ... + 17019191.

It is an arithmetic number, because the mean of its divisors is an integer number (34038378).

Almost surely, 2^102115131 is an apocalyptic number.

102115131 is a deficient number, since it is larger than the sum of its proper divisors (34038381).

102115131 is an equidigital number, since it uses as much as digits as its factorization.

102115131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34038380.

The product of its (nonzero) digits is 30, while the sum is 15.

The square root of 102115131 is about 10105.2031647068. The cubic root of 102115131 is about 467.4086008134.

Adding to 102115131 its reverse (131511201), we get a palindrome (233626332).

The spelling of 102115131 in words is "one hundred two million, one hundred fifteen thousand, one hundred thirty-one".