736147221 has 8 divisors (see below), whose sum is σ = 985023744. Its totient is φ = 489017760.

The previous prime is 736147219. The next prime is 736147231. The reversal of 736147221 is 122741637.

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

It is not a de Polignac number, because 736147221 - 2¹ = 736147219 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (736147211) 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, 435781 + ... + 437466.

It is an arithmetic number, because the mean of its divisors is an integer number (123127968).

Almost surely, 2^736147221 is an apocalyptic number.

It is an amenable number.

736147221 is a deficient number, since it is larger than the sum of its proper divisors (248876523).

736147221 is a wasteful number, since it uses less digits than its factorization.

736147221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873531.

The product of its digits is 14112, while the sum is 33.

The square root of 736147221 is about 27132.0331158577. The cubic root of 736147221 is about 902.9316831009.

Adding to 736147221 its reverse (122741637), we get a palindrome (858888858).

The spelling of 736147221 in words is "seven hundred thirty-six million, one hundred forty-seven thousand, two hundred twenty-one".