1315450221 has 8 divisors (see below), whose sum is σ = 1755310080. Its totient is φ = 876278592.

The previous prime is 1315450219. The next prime is 1315450229. The reversal of 1315450221 is 1220545131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1315450221 - 2¹ = 1315450219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1315450191 and 1315450200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315450229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167580 + ... + 175253.

It is an arithmetic number, because the mean of its divisors is an integer number (219413760).

Almost surely, 2^1315450221 is an apocalyptic number.

It is an amenable number.

1315450221 is a deficient number, since it is larger than the sum of its proper divisors (439859859).

1315450221 is a wasteful number, since it uses less digits than its factorization.

1315450221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344115.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1315450221 is about 36269.1359284999. The cubic root of 1315450221 is about 1095.6995234180.

Adding to 1315450221 its reverse (1220545131), we get a palindrome (2535995352).

The spelling of 1315450221 in words is "one billion, three hundred fifteen million, four hundred fifty thousand, two hundred twenty-one".