27213020251 has 2 divisors, whose sum is σ = 27213020252. Its totient is φ = 27213020250.

The previous prime is 27213020243. The next prime is 27213020293. The reversal of 27213020251 is 15202031272.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27213020251 - 2³ = 27213020243 is a prime.

It is a super-2 number, since 2×27213020251² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27213020201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13606510125 + 13606510126.

It is an arithmetic number, because the mean of its divisors is an integer number (13606510126).

Almost surely, 2^27213020251 is an apocalyptic number.

27213020251 is a deficient number, since it is larger than the sum of its proper divisors (1).

27213020251 is an equidigital number, since it uses as much as digits as its factorization.

27213020251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The spelling of 27213020251 in words is "twenty-seven billion, two hundred thirteen million, twenty thousand, two hundred fifty-one".