27451365231 has 4 divisors (see below), whose sum is σ = 36601820312. Its totient is φ = 18300910152.

The previous prime is 27451365217. The next prime is 27451365233. The reversal of 27451365231 is 13256315472.

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

It is not a de Polignac number, because 27451365231 - 2⁵ = 27451365199 is a prime.

It is a super-2 number, since 2×27451365231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27451365231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27451365233) 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, 4575227536 + ... + 4575227541.

It is an arithmetic number, because the mean of its divisors is an integer number (9150455078).

Almost surely, 2^27451365231 is an apocalyptic number.

27451365231 is a deficient number, since it is larger than the sum of its proper divisors (9150455081).

27451365231 is an equidigital number, since it uses as much as digits as its factorization.

27451365231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9150455080.

The product of its digits is 151200, while the sum is 39.

The spelling of 27451365231 in words is "twenty-seven billion, four hundred fifty-one million, three hundred sixty-five thousand, two hundred thirty-one".