102131530 has 32 divisors (see below), whose sum is σ = 188863488. Its totient is φ = 39748800.

The previous prime is 102131521. The next prime is 102131531. The reversal of 102131530 is 35131201.

It is not an unprimeable number, because it can be changed into a prime (102131531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68695 + ... + 70165.

It is an arithmetic number, because the mean of its divisors is an integer number (5901984).

Almost surely, 2^102131530 is an apocalyptic number.

102131530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102131530 is a deficient number, since it is larger than the sum of its proper divisors (86731958).

102131530 is a wasteful number, since it uses less digits than its factorization.

102131530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 102131530 is about 10106.0145458039. The cubic root of 102131530 is about 467.4336203617.

Adding to 102131530 its reverse (35131201), we get a palindrome (137262731).

The spelling of 102131530 in words is "one hundred two million, one hundred thirty-one thousand, five hundred thirty".