130224621 has 4 divisors (see below), whose sum is σ = 173632832. Its totient is φ = 86816412.

The previous prime is 130224581. The next prime is 130224649. The reversal of 130224621 is 126422031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-130224621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130224821) 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, 21704101 + ... + 21704106.

It is an arithmetic number, because the mean of its divisors is an integer number (43408208).

Almost surely, 2^130224621 is an apocalyptic number.

It is an amenable number.

130224621 is a deficient number, since it is larger than the sum of its proper divisors (43408211).

130224621 is an equidigital number, since it uses as much as digits as its factorization.

130224621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43408210.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 130224621 is about 11411.6002821690. The cubic root of 130224621 is about 506.8712992574.

Adding to 130224621 its reverse (126422031), we get a palindrome (256646652).

The spelling of 130224621 in words is "one hundred thirty million, two hundred twenty-four thousand, six hundred twenty-one".