130221437 has 4 divisors (see below), whose sum is σ = 132428640. Its totient is φ = 128014236.

The previous prime is 130221431. The next prime is 130221451. The reversal of 130221437 is 734122031.

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, and also an emirpimes, since its reverse is a distinct semiprime: 734122031 = 311 ⋅2360521.

It is a cyclic number.

It is not a de Polignac number, because 130221437 - 2⁶ = 130221373 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 (130221431) 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, 1103513 + ... + 1103630.

It is an arithmetic number, because the mean of its divisors is an integer number (33107160).

Almost surely, 2^130221437 is an apocalyptic number.

It is an amenable number.

130221437 is a deficient number, since it is larger than the sum of its proper divisors (2207203).

130221437 is an equidigital number, since it uses as much as digits as its factorization.

130221437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207202.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 130221437 is about 11411.4607741516. The cubic root of 130221437 is about 506.8671682123.

Adding to 130221437 its reverse (734122031), we get a palindrome (864343468).

The spelling of 130221437 in words is "one hundred thirty million, two hundred twenty-one thousand, four hundred thirty-seven".