27153343421 has 2 divisors, whose sum is σ = 27153343422. Its totient is φ = 27153343420.

The previous prime is 27153343351. The next prime is 27153343433. The reversal of 27153343421 is 12434335172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20320502500 + 6832840921 = 142550^2 + 82661^2 .

It is a cyclic number.

It is not a de Polignac number, because 27153343421 - 2³⁴ = 9973474237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27153343471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13576671710 + 13576671711.

It is an arithmetic number, because the mean of its divisors is an integer number (13576671711).

Almost surely, 2^27153343421 is an apocalyptic number.

It is an amenable number.

27153343421 is a deficient number, since it is larger than the sum of its proper divisors (1).

27153343421 is an equidigital number, since it uses as much as digits as its factorization.

27153343421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 35.

Adding to 27153343421 its reverse (12434335172), we get a palindrome (39587678593).

The spelling of 27153343421 in words is "twenty-seven billion, one hundred fifty-three million, three hundred forty-three thousand, four hundred twenty-one".