2130053621 has 4 divisors (see below), whose sum is σ = 2222664672. Its totient is φ = 2037442572.

The previous prime is 2130053609. The next prime is 2130053647. The reversal of 2130053621 is 1263500312.

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 cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2130053621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 92611027 = 2130053621 / (2 + 1 + 3 + 0 + 0 + 5 + 3 + 6 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130053671) 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, 46305491 + ... + 46305536.

It is an arithmetic number, because the mean of its divisors is an integer number (555666168).

Almost surely, 2^2130053621 is an apocalyptic number.

It is an amenable number.

2130053621 is a deficient number, since it is larger than the sum of its proper divisors (92611051).

2130053621 is an equidigital number, since it uses as much as digits as its factorization.

2130053621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92611050.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 2130053621 is about 46152.5039515734. The cubic root of 2130053621 is about 1286.6591479049.

Adding to 2130053621 its reverse (1263500312), we get a palindrome (3393553933).

The spelling of 2130053621 in words is "two billion, one hundred thirty million, fifty-three thousand, six hundred twenty-one".