5421437321 has 4 divisors (see below), whose sum is σ = 5567962692. Its totient is φ = 5274911952.

The previous prime is 5421437317. The next prime is 5421437347. The reversal of 5421437321 is 1237341245.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5081551225 + 339886096 = 71285^2 + 18436^2 .

It is a cyclic number.

It is not a de Polignac number, because 5421437321 - 2² = 5421437317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5421437221) 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, 73262630 + ... + 73262703.

It is an arithmetic number, because the mean of its divisors is an integer number (1391990673).

Almost surely, 2^5421437321 is an apocalyptic number.

It is an amenable number.

5421437321 is a deficient number, since it is larger than the sum of its proper divisors (146525371).

5421437321 is a wasteful number, since it uses less digits than its factorization.

5421437321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146525370.

The product of its digits is 20160, while the sum is 32.

The square root of 5421437321 is about 73630.4103003643. The cubic root of 5421437321 is about 1756.7291740871.

Adding to 5421437321 its reverse (1237341245), we get a palindrome (6658778566).

The spelling of 5421437321 in words is "five billion, four hundred twenty-one million, four hundred thirty-seven thousand, three hundred twenty-one".