8130449021 has 4 divisors (see below), whose sum is σ = 8188941600. Its totient is φ = 8071956444.

The previous prime is 8130449017. The next prime is 8130449027. The reversal of 8130449021 is 1209440318.

It is a happy number.

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 not a de Polignac number, because 8130449021 - 2² = 8130449017 is a prime.

It is a super-2 number, since 2×8130449021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8130449027) 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, 29246081 + ... + 29246358.

It is an arithmetic number, because the mean of its divisors is an integer number (2047235400).

Almost surely, 2^8130449021 is an apocalyptic number.

It is an amenable number.

8130449021 is a deficient number, since it is larger than the sum of its proper divisors (58492579).

8130449021 is a wasteful number, since it uses less digits than its factorization.

8130449021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58492578.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 8130449021 is about 90169.0025507657. The cubic root of 8130449021 is about 2010.8121946415.

Adding to 8130449021 its reverse (1209440318), we get a palindrome (9339889339).

The spelling of 8130449021 in words is "eight billion, one hundred thirty million, four hundred forty-nine thousand, twenty-one".