185040461213 has 2 divisors, whose sum is σ = 185040461214. Its totient is φ = 185040461212.

The previous prime is 185040461197. The next prime is 185040461231. The reversal of 185040461213 is 312164040581.

Together with next prime (185040461231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160798594009 + 24241867204 = 400997^2 + 155698^2 .

It is a cyclic number.

It is not a de Polignac number, because 185040461213 - 2⁴ = 185040461197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (185040461233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92520230606 + 92520230607.

It is an arithmetic number, because the mean of its divisors is an integer number (92520230607).

Almost surely, 2^185040461213 is an apocalyptic number.

It is an amenable number.

185040461213 is a deficient number, since it is larger than the sum of its proper divisors (1).

185040461213 is an equidigital number, since it uses as much as digits as its factorization.

185040461213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 185040461213 in words is "one hundred eighty-five billion, forty million, four hundred sixty-one thousand, two hundred thirteen".