5145351221 has 4 divisors (see below), whose sum is σ = 5416159200. Its totient is φ = 4874543244.

The previous prime is 5145351217. The next prime is 5145351271. The reversal of 5145351221 is 1221535415.

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: 1221535415 = 5 ⋅244307083.

It is a cyclic number.

It is not a de Polignac number, because 5145351221 - 2² = 5145351217 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 (5145351271) 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, 135403961 + ... + 135403998.

It is an arithmetic number, because the mean of its divisors is an integer number (1354039800).

Almost surely, 2^5145351221 is an apocalyptic number.

It is an amenable number.

5145351221 is a deficient number, since it is larger than the sum of its proper divisors (270807979).

5145351221 is a wasteful number, since it uses less digits than its factorization.

5145351221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270807978.

The product of its digits is 6000, while the sum is 29.

The square root of 5145351221 is about 71731.1035813614. The cubic root of 5145351221 is about 1726.3877339253.

Adding to 5145351221 its reverse (1221535415), we get a palindrome (6366886636).

The spelling of 5145351221 in words is "five billion, one hundred forty-five million, three hundred fifty-one thousand, two hundred twenty-one".