130220424 has 24 divisors (see below), whose sum is σ = 352680510. Its totient is φ = 43406784.

The previous prime is 130220423. The next prime is 130220449. The reversal of 130220424 is 424022031.

It can be written as a sum of positive squares in only one way, i.e., 127916100 + 2304324 = 11310^2 + 1518^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 130220397 and 130220406.

It is not an unprimeable number, because it can be changed into a prime (130220423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 904237 + ... + 904380.

Almost surely, 2^130220424 is an apocalyptic number.

It is an amenable number.

130220424 is an abundant number, since it is smaller than the sum of its proper divisors (222460086).

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

130220424 is a wasteful number, since it uses less digits than its factorization.

130220424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808629 (or 1808622 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 130220424 is about 11411.4163888625. The cubic root of 130220424 is about 506.8658538926.

Adding to 130220424 its reverse (424022031), we get a palindrome (554242455).

The spelling of 130220424 in words is "one hundred thirty million, two hundred twenty thousand, four hundred twenty-four".