27213451225 has 9 divisors (see below), whose sum is σ = 33745702333. Its totient is φ = 21770101120.

The previous prime is 27213451163. The next prime is 27213451273. The reversal of 27213451225 is 52215431272.

The square root of 27213451225 is 164965.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 10902074569 + 16311376656 = 104413^2 + 127716^2 .

It is not a de Polignac number, because 27213451225 - 2⁹ = 27213450713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 808329 + ... + 841321.

Almost surely, 2^27213451225 is an apocalyptic number.

27213451225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27213451225 is the 164965-th square number.

27213451225 is the 82483-rd centered octagonal number.

It is an amenable number.

27213451225 is a deficient number, since it is larger than the sum of its proper divisors (6532251108).

27213451225 is an frugal number, since it uses more digits than its factorization.

27213451225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65996 (or 32998 counting only the distinct ones).

The product of its digits is 33600, while the sum is 34.

Adding to 27213451225 its reverse (52215431272), we get a palindrome (79428882497).

The spelling of 27213451225 in words is "twenty-seven billion, two hundred thirteen million, four hundred fifty-one thousand, two hundred twenty-five".