1313774221 has 4 divisors (see below), whose sum is σ = 1341726912. Its totient is φ = 1285821532.

The previous prime is 1313774219. The next prime is 1313774249. The reversal of 1313774221 is 1224773131.

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 1313774221 - 2¹ = 1313774219 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 (1313774321) 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, 13976275 + ... + 13976368.

It is an arithmetic number, because the mean of its divisors is an integer number (335431728).

Almost surely, 2^1313774221 is an apocalyptic number.

It is an amenable number.

1313774221 is a deficient number, since it is larger than the sum of its proper divisors (27952691).

1313774221 is an equidigital number, since it uses as much as digits as its factorization.

1313774221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27952690.

The product of its digits is 7056, while the sum is 31.

The square root of 1313774221 is about 36246.0235198290. The cubic root of 1313774221 is about 1095.2339862624.

The spelling of 1313774221 in words is "one billion, three hundred thirteen million, seven hundred seventy-four thousand, two hundred twenty-one".