130021530 has 32 divisors (see below), whose sum is σ = 325620864. Its totient is φ = 33164736.

The previous prime is 130021523. The next prime is 130021547. The reversal of 130021530 is 35120031.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93529 + ... + 94908.

It is an arithmetic number, because the mean of its divisors is an integer number (10175652).

Almost surely, 2^130021530 is an apocalyptic number.

130021530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

130021530 is an abundant number, since it is smaller than the sum of its proper divisors (195599334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

130021530 is a wasteful number, since it uses less digits than its factorization.

130021530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188470.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 130021530 is about 11402.6983648608. The cubic root of 130021530 is about 506.6076661638.

Adding to 130021530 its reverse (35120031), we get a palindrome (165141561).

The spelling of 130021530 in words is "one hundred thirty million, twenty-one thousand, five hundred thirty".