130021553 has 4 divisors (see below), whose sum is σ = 135674688. Its totient is φ = 124368420.

The previous prime is 130021547. The next prime is 130021571. The reversal of 130021553 is 355120031.

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: 355120031 = 7 ⋅50731433.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130021553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130021513) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2826533 + ... + 2826578.

It is an arithmetic number, because the mean of its divisors is an integer number (33918672).

Almost surely, 2^130021553 is an apocalyptic number.

It is an amenable number.

130021553 is a deficient number, since it is larger than the sum of its proper divisors (5653135).

130021553 is an equidigital number, since it uses as much as digits as its factorization.

130021553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5653134.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 130021553 is about 11402.6993733940. The cubic root of 130021553 is about 506.6076960357.

Adding to 130021553 its reverse (355120031), we get a palindrome (485141584).

The spelling of 130021553 in words is "one hundred thirty million, twenty-one thousand, five hundred fifty-three".