1361577221 has 8 divisors (see below), whose sum is σ = 1433964000. Its totient is φ = 1289262960.

The previous prime is 1361577199. The next prime is 1361577229. The reversal of 1361577221 is 1227751631.

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

It is a cyclic number.

It is not a de Polignac number, because 1361577221 - 2¹⁰ = 1361576197 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 (1361577229) 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, 22811 + ... + 56951.

It is an arithmetic number, because the mean of its divisors is an integer number (179245500).

Almost surely, 2^1361577221 is an apocalyptic number.

It is an amenable number.

1361577221 is a deficient number, since it is larger than the sum of its proper divisors (72386779).

1361577221 is a wasteful number, since it uses less digits than its factorization.

1361577221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36259.

The product of its digits is 17640, while the sum is 35.

The square root of 1361577221 is about 36899.5558374352. Note that the first 3 decimals coincide. The cubic root of 1361577221 is about 1108.3597832093.

The spelling of 1361577221 in words is "one billion, three hundred sixty-one million, five hundred seventy-seven thousand, two hundred twenty-one".